MIAMI — Republicans are trying to seize on President Barack Obama’s nuclear deal with Iran and strained ties with Israel’s leader to cultivate Jewish voters, reasoning that a small shift in the margins could help them in battleground states like Florida, Ohio and Pennsylvania.

Democrats dismiss the effort as demagoguery from the right, saying that most Jewish voters will remain loyal to the left. The front-runner for their party’s presidential nomination, former Secretary of State Hillary Rodham Clinton, is among those supporting the agreement.

Congress will have a 60-day window to review the deal and could pass legislation stopping Obama from lifting its sanctions on Iran. Republican debates, which begin next month, give GOP hopefuls a stage to keep the topic on the 2016 radar.

Obama said he hopes the debate on the deal would be “based on the facts, not on politics, not on posturing.”

The Republican Jewish Coalition’s Mark McNulty said the agreement to restrict Iranian nuclear development in exchange for sanctions relief is “the brainchild of Obama and Clinton, so it could be very appealing for a Jewish voter to consider a Republican in the White House.”