Democrats just got a six-figure boost to their efforts to stave off a Republican takeover of the Virginia Senate.

The Democratic National Committee Federal Fund donated $100,000 to the Democratic Senate Caucus on Oct. 20, according to the Virginia Public Access Project, a nonpartisan tracker of money in politics.

While large, the contribution is not nearly big enough to overcome the huge fundraising advantage that Republicans had over Democrats as of Sept. 30, according to a VPAP analysis. Republican non-candidate committees had $4.6 million to Democratic committees’ $2.1 million.

The GOP, which already holds the House of Delegates and the governor’s mansion, only needs to pick up two seats to take control of the General Assembly’s upper chamber.

The DNC contribution comes as big names from both parties prepare to lend a hand in the local races. Republican presidential hopeful Mitt Romney will appear Wednesday at Fairfax County Republican Committee headquarters, while former President Bill Clinton will headline a fundraiser for Senate Democrats in McLean.