Story highlights Republicans in the West Bank are working to drum up support for presidential candidate Donald Trump.

iVote Israel, non-partisan group that helps Americans register to vote overseas, says there are 200,000 US voters in Israel.

Jerusalem (CNN) Republican supporters of Donald Trump have opened a campaign office in the West Bank, in what they say is a first, hoping to recruit American-Israelis living in the settlements to vote for the Republican presidential candidate.

A banner reading "Trump, the interest of Israel" in Hebrew marks the location of the makeshift headquarters, in a home in the northern West Bank settlement of Karnei Shomron.

Inside, volunteers use laptops set up on the kitchen table to register American-Israelis as absentee voters, and Marc Zell, co-chairman of Republicans Overseas Israel, hands out "Trump for President" pins.

Zell, an American-Israeli who lives in the West Bank settlement of Tekoa, was an ardent supporter of Florida Sen. Marco Rubio and a harsh critic of Trump during the Republican presidential primaries, blasting Trump often on his Twitter account: "Trump is tripping over himself on foreign policy. How can we trust this guy to be Commander in Chief?" and saying "Trump is disgracing himself about 9-11."

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But after Rubio dropped out, Zell switched sides and became a fervent Trump backer.

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