Columnist George Will didn’t hold back on Sunday when he questioned what the Mitt Romney campaign is doing with “bloviating ignoramus” Donald Trump.

Trump, who endorsed Romney in February, is currently serving as the star power for a “Dine with the Donald” raffle dinner with Romney, Trump and a supporter. The Romney campaign stood by its decision to campaign with Trump despite his latest comments questioning whether President Barack Obama was born in the United States.

“I do not understand the cost benefit here,” Will said during ABC’s “This Week.” “The costs are clear. The benefit — what voter is gonna vote for him [Romney] because he is seen with Donald Trump? The cost of appearing with this bloviating ignoramus is obvious it seems to me.”

He continued, “Donald Trump is redundant evidence that if your net worth is high enough, your IQ can be very low and you can still intrude into American politics. Again, I don’t understand the benefit. What is Romney seeking?”

It’s not the first time Will has taken a swipe at the real estate mogul: In December, he said the GOP candidates should not allow themselves to be “hijacked” by Trump and his attempted presidential debate. Trump hit back, calling the nationally syndicated columnist a “third-rate” who “makes so many wrong predictions.”

Watch below, via ABC. Will’s comments begin around the 13:00 mark.

George Will: What Is Mitt Romney Doing With Bloviating Ignoramus Donald Trump?