Maine Democrat Sara Gideon outraised Sen. Susan Collins Susan Margaret CollinsJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally Momentum growing among Republicans for Supreme Court vote before Election Day MORE (R) in the first quarter of 2020 in one of the year's most closely watched Senate races.

Gideon, the Maine House Speaker, raised about $7.1 million in the first three months of 2020 compared to about $2.4 million for Collins, according to new filings with the Federal Election Commission. However, Gideon finishing March with about $4.6 million cash on hand compared to Collins's $5.6 million in the bank.

Gideon’s campaign has relied heavily on small-dollar donors, saying that 96 percent of its contributions thus far have totaled $100 or less.

ADVERTISEMENT

Polls show Gideon and Collins are neck and neck in the race, which has become a magnet for millions of dollars of outside money.

Democrats are clamoring to flip Collins’s seat, which she has held since 1997. The Maine Republican has for decades worked to cultivate a bipartisan reputation but has become a top target for liberals after her votes to approve President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE’s tax plan in 2017 and to confirm Supreme Court Justice Brett Kavanaugh Brett Michael KavanaughMomentum growing among Republicans for Supreme Court vote before Election Day Remembering Ginsburg's patriotism and lifelong motivation Collins: President elected Nov. 3 should fill Supreme Court vacancy MORE in the wake of sexual assault allegations.

Gideon still has to win a primary race against two other Democrats to secure the party’s nomination, but has won the support of Senate Democrats’ campaign arm and has blown her intraparty competition away in fundraising.

Collins is one of two Republican senators running for reelection in a state President Trump lost in 2016. The Cook Political Report, a nonpartisan election handicapper, rates the Maine race a “toss-up.”