Updated: November 14, 2015 10:41 PM ET | Originally published: November 14, 2015 10:20 PM EST

Presidential candidate Martin O’ Malley called Donald Trump an “immigrant-bashing carnival barker” at Saturday night’s Democratic debate, criticizing the GOP candidate’s stance on immigration.

The former Maryland governor noted that net immigration from Mexico last year was zero, after drawing a distinction between border security and a comprehensive immigration policy.

“We’ve actually been focusing on border security to the exclusion of talking about comprehensive immigration reform,” said O’ Malley.

Trump responded in a tweet during the debate.

Contact us at letters@time.com.

Read More From TIME

Related Stories