"I won't say who — but their barbers know, their hairdressers," he said.
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The cartoonist says he used Matt Bevin's adopted Ethopian children "to express outrage" about the issue.
Clinton calls on all candidates to denounce the idea.
"I mean, how is that at all American?" O'Malley asked.
Jordan Fabian 11/20/15 09:00 AM EST
The Obama administration says its refugee-screening process is already strong.
"It's manipulating people's angst and their fears," Bush says.
"in my mind, the odds are that eventually one of them will succeed," Rubio said.
"The blood of a lot of these French young people is on his hands,” said James Woolsey.
Paul warned against calls to "give up your liberty" after the deadly attacks.
The Justice Department is already looking into the Republican's activities.