WASHINGTON — Nearly a year out from the 2026 midterms, the latest federal fundraising reports show challengers outraising several vulnerable House and Senate members in key races.

Candidates continued to build up their campaign resources between the months of June and September, the filings show. In some cases, high-profile challengers, including former officeholders and political newcomers, made their entrances known with multimillion-dollar hauls.

While House fundraising remained in full swing during the third quarter, mid-decade redistricting efforts across the country have created some uncertainty around who could be the most vulnerable lawmakers on the ballot next year.

Here are some takeaways from the reports filed with the Federal Election Commission for the three months ending Sept. 30:

—Vulnerable senators build their war chests

Maine Sen. Susan Collins, the most vulnerable Republican up for reelection next year, raised $1.9 million from June through September, closing last month with $6.7 million on hand.

But Collins was outraised by one of the several Democrats seeking to deny her a sixth term. Oyster farmer Graham Platner, a political newcomer backed by Vermont independent Sen. Bernie Sanders, raised $3.2 million after launching his campaign in August through the end of September.

Former Capitol Hill aide Jordan Wood raised $1.5 million over the three-month period, while Maine Beer Company founder Dan Kleban, who suspended his campaign earlier this week and endorsed Democratic Gov. Janet Mills, raised $337,000. Mills’ campaign said Wednesday that she had raised $1 million in the first 24 hours since announcing her bid on Tuesday.

In Georgia, Sen. Jon Ossoff, the chamber’s most vulnerable Democrat, continued to crush his GOP opponents in fundraising. He raised $12.1 million over the past three months and ended the quarter with $21.4 million in the bank. On the Republican side, former University of Tennessee football coach Derek Dooley brought in $1.9 million; Rep. Mike Collins, $1.7 million; and Rep. Earl L. “Buddy” Carter, $940,000. But Carter had $3.9 million in the bank at the end of the quarter, more than his Republican rivals.

In Texas, Republican Sen. John Cornyn reported raising $910,000 through his main reelection committee and about $2.4 million through his joint fundraising accounts.

One of his primary opponents, state Attorney General Ken Paxton, raised $1.3 million in the quarter, while Rep. Wesley Hunt, who launched his campaign last week, reported raising $366,000 for his House account.

A pair of Democratic Senate hopefuls outraised the Republican candidates: State Rep. James Talarico hauled in $6.3 million in the three weeks since launching his campaign, while former Rep. Colin Allred, who lost a bid for the state’s other Senate seat last year, raised $4.9 million.

Ohio Democrat Sherrod Brown, who is seeking a Senate comeback after losing his seat in 2024, continues to be a prolific fundraiser. His campaign reported total receipts of $7 million in the first six weeks since he launched his bid to unseat Republican Sen. Jon Husted. Another Democrat, wealthy business owner Frederick Ode, reported contributing $5 million to his long-shot campaign. Husted, who was appointed earlier this year by Ohio Gov. Mike DeWine to complete the unfinished term of Vice President JD Vance, reported total receipts of $2.8 million during the third quarter.

Republican Sen. Bill Cassidy of Louisiana, who faces multiple primary challengers, raised nearly $1.4 million for his Senate account during the third quarter, ending September with $9.5 million on hand. State Sen. Blake Miguez, brought in $1.2 million, while state Treasurer John Fleming reported a haul of $2.2 million. But about $2.1 million of that sum was in the form of a loan from Fleming, bringing to $6.2 million the total amount the former congressman has loaned his campaign, with the bulk of that paid back over several filing periods.

And in Massachusetts, Democratic Sen. Edward J. Markey raised $756,000 in the third quarter and ended it with $2.7 million on hand. Democratic Rep. Seth Moulton, who launched a primary challenge to Markey this week, had $2.1 million in his campaign account on Sept. 30, funds he can transfer for his Senate run.

—Money flows in races for open Senate seats

In the contest to succeed retiring Republican Sen. Thom Tillis in North Carolina, former Gov. Roy Cooper, one of the Democrats’ big recruiting victories, raised $10.9 million for his campaign account. His opponent, former Republican National Committee Chairman Michael Whatley, hauled in $1.4 million.

In Michigan, Republican former Rep. Mike Rogers, who’s making his second consecutive Senate bid, reported a third-quarter haul of $2.2 million, which included transfers from his joint fundraising committee of funds raised in the second quarter. He had $2.7 million on hand at the end of September, the most in the field.

Among the Democrats who will contend in an August 2026 primary, Rep. Haley Stevens raised $1.9 million, former state public health official Abdul El-Sayed raised $1.8 million; and state Sen. Mallory McMorrow raised $1.7 million as they vie to succeed retiring Democratic Sen. Gary Peters.

Stevens ended September with $2.6 million on hand, compared with $1.8 million for El-Sayed and $1.5 million for McMorrow.

In Minnesota, where Democratic Sen. Tina Smith is retiring, Rep. Angie Craig raised $2.2 million in the third quarter, surpassing the $915,000 reported by fellow Democrat Peggy Flanagan, the state’s lieutenant governor.

Craig entered October with $3.0 million in her campaign account, while Flanagan had $836,000.

In New Hampshire, Democratic Rep. Chris Pappas’ campaign raised $1.8 million in the third quarter in his campaign for the seat that Democrat Jeanne Shaheen is vacating. Former Massachusetts Sen. Scott P. Brown, who’s making his second run for the seat, raised $969,000 in the Republican primary, which could soon include former Sen. John E. Sununu.

In Iowa, GOP Rep. Ashley Hinson, who is running to succeed retiring Republican Sen. Joni Enrst, raised $1.7 million in the third quarter after launching her campaign early last month. She had $4.1 million on hand at the end of September, far exceeding her Democratic rivals.

State Rep. Josh Turek was the top Democratic fundraiser for the quarter, bringing in $1 million, compared with $647,000 for state Sen. Zach Wahls, $411,000 for Marine and Army veteran Nathan Sage and $346,000 for Des Moines School Board Chairwoman Jackie Norris, who on Thursday suspended her campaign.

A handful of open Senate seats are seen as safe for either party, so the real action is in the primary.

In Illinois, Rep. Raja Krishnamoorthi reported total third-quarter receipts of $12.2 million in his bid for the Democratic nomination to succeed retiring Sen. Richard J. Durbin, but $9.1 million of that figure was a transfer from his House committee. Lt. Gov. Juliana Stratton raised $1 million, while Rep. Robin Kelly raised $278,000.

Krishnamoorthi dwarfed his opponents in cash on hand, closing the quarter with $18.1 million in his Senate account, while Stratton had $920,000 and Kelly had $2 million.

In Alabama, where GOP Sen. Tommy Tuberville is running for governor, Rep. Barry Moore, who launched his campaign in August, reported raising $519,000 in the third quarter, while state Attorney General Steven Marshall posted a haul of $418,000.

And in the Republican race to succeed retiring Sen. Mitch McConnell in Kentucky, Rep. Andy Barr raised $1.8 million in the quarter and had $6.7 million on hand, far more than both of his leading opponents. Businessman Nate Morris reported a third-quarter haul of $4 million, including a $3 million personal loan. Former state Attorney General Daniel Cameron raised about $411,000.

—Big quarter for some Democratic primary challengers

Several entrenched blue-state House Democrats were outpaced by primary challengers, suggesting calls for generational change are gaining traction with the party’s base.

Northern California Rep. Mike Thompson, who has been in Congress for more than a quarter of a century, raised about $612,000, a sum dwarfed by the $1.5 million that Napa Valley venture capitalist Eric Jones brought in during the third quarter. (Jones’ total included a $149,000 contribution made to his campaign.)

In Southern California, 15-term incumbent Brad Sherman raised $323,000, less than half of the $694,000 haul reported by Jake Levine, a former Biden administration official who is the son of former Rep. Mel Levine, a Democrat.

In Connecticut, 14-term incumbent John B. Larson brought in about $809,000, while one of his challengers, former Hartford Mayor Luke Bronin, raised $1.2 million. Another Democrat in the race, Southington Town Council Member Jack Perry, netted $528,000, which included a $500,000 loan.

Tennessee Rep. Steve Cohen brought in $41,000, although he had nearly $1.8 million in the bank. Cohen is facing a primary challenge from state Rep. Justin Pearson, who rose to national prominence after his expulsion from the state House over a gun control protest in 2023. Pearson, however, didn’t launch his campaign until earlier this month.

In Massachusetts, Rep. Stephen F. Lynch, who’s in his 12th full term representing territory south of Boston, raised $61,000 in the quarter, while Democratic opponent Patrick Roath brought in $143,000. The incumbent had more than $1 million in the bank, though, to Roath’s $261,000.

And Democrat Eleanor Holmes Norton, who has served as the District of Columbia’s delegate in the House for more than three decades, raised $3,200 in the third quarter. Challenger Kinney Zalesne, a former deputy national finance chair at the Democratic National Committee, collected $436,000. Despite calls for her to retire, the 88-year-old Norton said she intends to seek a 19th term in 2026. More challengers have entered the Democratic primary in recent weeks, including D.C. Councilmembers Robert White and Brooke Pinto.

—House incumbents get outraised in battleground districts

At least seven House members in races considered competitive by Inside Elections with Nathan L. Gonzales were outraised by an opponent in the third quarter.

In Colorado, Republican freshman Jeff Crank was outraised by Democrat Jessica Killin, who served as chief of staff to Doug Emhoff when he was second gentleman. Killin raised $1 million to the congressman’s $502,000.

Iowa Rep. Mariannette Miller-Meeks, who ranks among the most vulnerable Republicans in the chamber, was outraised by a familiar face: Democrat Christina Bohannan, who’s lost two straight races to the Republican. Bohannan raised $1.1 million in the third quarter, while Miller-Meeks took in $807,000. The incumbent did enter October with a bigger bank balance, with $2.6 million available to Bohannan’s $1.6 million.

In Pennsylvania, Democrat Janelle Stelson, who is challenging GOP Rep. Scott Perry for the second time, outraised the former House Freedom Caucus chair $1.2 million to $649,000. Perry, however, ended the third quarter with $1.4 million on hand to Stelson’s $970,000.

In a Toss-up race in southern Arizona, Democratic challenger JoAnna Mendoza narrowly edged past second-term Republican Juan Ciscomani in third-quarter fundraising, $696,000 to $613,000. Ciscomani, though, reported $2.4 million in his campaign coffers on Sept. 30, compared with $950,000 for Mendoza.

Three House Democrats were outraised by self-funding Republican challengers.

North Carolina Rep. Don Davis raised $557,000, while Republican challenger Sandy Roberson reported total receipts of $1.3 million. That included a $1 million loan to his campaign, bringing the Rocky Mount mayor’s total loans for the cycle so far to $3 million.

Nevada Rep. Susie Lee raised $612,000 in the third quarter. Republican neurosurgeon Aury Nagy loaned his campaign $1 million and reported raising only about $8,000 through other contributions.

And in South Texas, Rep. Vicente Gonzales was outraised by two Republican opponents. Businessman Scott Mandel gave his campaign $1 million and did not raise any other money, while Army veteran Eric Flores raised $550,000, including a $250,000 loan.

Gonzales collected $444,000 during the third quarter and had $1.3 million available at the end of September.

A handful of battleground House incumbents posted total receipts of more than $1 million in the third quarter, including Republicans Eli Crane of Arizona, Young Kim of California, Mike Lawler of New York and Derrick Van Orden of Wisconsin, as well as Democrats Eugene Vindman of Virginia, Derek Tran of California, Tom Suozzi of New York and Jared Golden of Maine.

Meanwhile, conservative firebrand Lauren Boebert was significantly outraised by one of her Democratic opponents in Colorado’s deep-red 4th District. Navy veteran Eileen Laubacher raised nearly $2.5 million, compared with $110,000 for the GOP incumbent. Inside Elections rates the race Safe Republican, and Boebert has dispatched well-funded Democratic opponents before.

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