Sen. Marco Rubio (R-Fla.) won the Puerto Rico Republican primary on Sunday, giving his presidential campaign a badly needed boost on a weekend already mired by losses.
It wasn't clear how many delegates Rubio had when the Associated Press called the race for the senator on Sunday afternoon. He traveled to Puerto Rico on Saturday for a series of last-minute appearances in hopes of shoring up support. The win is likely to yield Rubio all of the island's 23 delegates...
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