Former Maryland Gov. Martin O'Malley called Republican candidate Donald Trump an "immigrant-bashing carnival barker" during the Democratic debate Saturday night.

Moderator Kevin Cooney asked O'Malley if he was willing to compromise on immigration, focusing on border security first, in light of Republicans saying securing the border is a top priority and Democrats calling for comprehensive immigration reform.

"Mr. Cooney, we've actually been focusing on border security to the exclusion of talking about comprehensive immigration reform," O'Malley said. "In fact, if more border security and more and more deportations were going to bring our Republican brothers and sisters to the table, it would have happened long ago."

"The fact of the matter is, and let's say it in our debate because you'll never hear this from that immigrant-bashing carnival barker Donald Trump," O'Malley said, to applause and a smile from Hillary Clinton.

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