Sen. Marco Rubio (R-Fla.) is vowing to break with conservatives in his party and help confirm President Obama’s controversial choice for ambassador to El Salvador when she comes before the Senate, possibly as early as Wednesday.

Obama gave Mari Carmen Aponte a recess appointment in 2010 but it expired at the end of last year after Senate Republicans filibustered her. Some Republicans have raised concerns that Aponte might have dated a Cuban spy 20 years ago, while others sought to use her nomination to pressure the administration to change other Latin American policies.

Rubio, a possible GOP vice presidential candidate and rising star in the Republican Party, initially opposed Aponte’s nomination, but has since shifted, a spokesman told The Hill.

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