In this week's debate, Senators Ted Cruz reprised their battle over immigration from 2013, Cruz called Rubio a supporter of "amnesty in a post-debate interview. Rubio responds today at an event in Iowa.
"Ted is a supporter of legalizing people that are in this country illegally," Rubio said. "In fact, when the Senate bill [in 2013] was proposed, he proposed giving them work permits. He’s also supported a massive expansion of the green cards. He's supported a massive expansion of the [H-1B] program, a 500 percent increase."
Rubio also warns against getting involved in the personal attack game -- this difference is all policy.
"I know it makes more interesting coverage if we hate each other, but we don't."