In the most direct statement to date about the Republican open letter to Iran, President Obama said that he’s “embarrassed for them.”

”For them to address a letter to the ayatollah — the supreme leader of Iran, who they claim is our mortal enemy — and their basic argument to them is: don’t deal with our president, because you can’t trust him to follow through on an agreement… That’s close to unprecedented,” he said in an interview with VICE News.

VICE News released a “trailer” of its interview with Obama which it conducted Thursday, but won’t release the full interview until Monday. The trailer included Obama’s comments on the letter.