President Obama implored supporters on Monday for donations to help Democrats in the 15 Senate seats he said were "up for grabs" on Nov. 2.
The president painted a picture of an expansive map of competitive Senate races in a fundraising e-mail for the Democratic Senatorial Campaign Committee (DSCC).
Republicans need to pick up a net gain of 10 Senate seats on Election Day in order to win back a majority in the Senate, and make Sen. Mitch McConnellMitch McConnellPeter Thiel does not make the GOP pro-gay Reid: Trump is a 'hateful con man' McAuliffe: Clinton won't move TPP without changes MORE (R-Ky.) the majority leader.
The nonpartisan Cook Political Report lists 11 races as "toss up" contests, nine of which are currently controlled by Democrats. Republicans are also seen by Cook as being well-positioned to pick up Democratic seats in Indiana, Arkansas and North Dakota.
Obama said in his appeal to Democrats that the 15-seat playing field he described — and it's not clear which races exactly make up that list — will be "going right down to the wire."
The president will be lending his support for vulnerable Democrats, too, with several days of travel and fundraising this week. Obama will attend a DSCC fundraiser in suburban Washington DC on Monday night, and travel to Washington on Thursday for an event for Sen. Patty MurrayPatty MurrayOur children, our future – bridging the partisan divide Overnight Energy: Officials close in on new global emissions deal NBA pulls All-Star Game from NC over bathroom law MORE (D). He'll attend fundraisers for Sen. Barbara BoxerBarbara BoxerReid faces Sanders supporters' fury at DNC Calif. Dem touts her 'badass' sister's Senate run The Trail 2016: One large crack in the glass ceiling MORE (D-Calif.) and Senate Majority Leader Harry ReidHarry ReidThe Trail 2016: Her big night Reid: Trump 'may have' broken the law with Russia remarks Senator slams Reid for 'dangerous game' on Trump briefings MORE (D-Nev.) in their respective states on Friday.
"The DSCC has already begun to shift momentum in our favor in critical races — but Republicans only need to win 10 of the 15 seats up for grabs to take the majority," Obama wrote Monday. "But if you keep moving forward in the face of difficulty, we will win this election."