At the American Israel Public Affairs Committee conference in Washington, D.C., Republican presidential candidate Donald Trump was a clear favorite.

That is if sales of yarmulkes are any indication of the GOP front-runner’s popularity.

One vendor selling kippas with Trump’s campaign logo at the conference on Monday said he was “inundated” with requests for the “Donald Trump 2016” skullcap, reported The Washington Free Beacon.

“I totally underestimated the degree of support that Jewish people who are attending this event have for Trump,” said Marc Daniels. “I probably had about 50 inquiries for Trump yarmulkes that I could not fulfill.”

Selling two or three Ted Cruz yarmulkes and about four with John Kasich’s name, Daniels said the ones bearing Trump’s name sold out almost immediately.

Daniels, who runs an online yarmulke shop called Marc’s Garden Jubilee, was not as successful selling the Hillary Clinton or Bernie Sanders caps which he tried to liquidate by the end of the evening.