Rubio wins DC caucus

Marco RubioMarco Antonio RubioUS-Saudi Arabia policy needs a dose of 'realpolitik' Media cried wolf: Calling every Republican a racist lost its bite Rubio criticizes reporters, Democrat for racism accusations against McCain MORE has been projected the winner of the Washington, D.C., Republican caucus Saturday. 

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The Florida senator beat out Ohio Gov. John Kasich by just 50 votes, according to The New York Times, ultimately winning 37 percent of the vote. 

Kasich followed with 35 percent. Donald TrumpDonald John TrumpUS-Saudi Arabia policy needs a dose of 'realpolitik' Trump talks to Swedish leader about rapper A$AP Rocky, offers to vouch for his bail Matt Gaetz ahead of Mueller hearing: 'We are going to reelect the president' MORE and Texas Sen. Ted CruzRafael (Ted) Edward CruzHow to reduce Europe's dependence on Russian energy Cruz calls for 'every penny' of El Chapo's criminal enterprise to be used for Trump's wall after sentencing Conservatives defend Chris Pratt for wearing 'Don't Tread On Me' T-shirt MORE trailed with 14 and 12 percent of the vote, respectively.

D.C. is a small victory for Rubio, who has struggled in primary contests; his lone win was in Minnesota. 

D.C. has 19 delegates. Rubio will take 10 and Kasich will take nine. Cruz and Trump didn't win any delegates, which could bolster their anti-Washington talking points. 

Rubio and Kasich will both make what could be their last stands on Tuesday in their home states of Florida and Ohio, hoping the winner-take-all contests will help halt Trump's trajectory toward the nomination.