Democratic presidential candidate Pete Buttigieg invoked President Donald Trump’s porn star scandal Tuesday, reviving a line of attack that helped catapult his longshot campaign into a viable contender last year.

Conservative radio host Rush Limbaugh, who was awarded the Presidential Medal of Freedom at President Donald Trump’s State of the Union, said the president told him to “never apologize” for his comments about Buttigieg’s sexuality.

Limbaugh said last week that America isn’t ready to elect a gay man who kisses his husband onstage. Trump, however, suggested last week that he would vote for a gay presidential candidate.

Asked if he takes the president at his word, Buttigieg told CNN’s Erin Burnett at a Las Vegas town hall: “Not if he’s sending out his supporters to talk in this way.”