Hillary’s Clinton foreign policy spokesman had harsh words for Donald Trump on Twitter during the second presidential debate Sunday night.

hey, @realDonaldTrump – regarding your claim that Captain Khan would be alive if you were president: go fuck yourself.#debate — Jesse Lehrich (@JesseLehrich) October 10, 2016

The harsh tweet from Lehrich was in regards to Trump’s remarks calling Captain Humayun Khan an “American hero” who would still be alive today if he was president because he would have opposed sending American troops into Iraq.

“Captain Kahn is an America hero,” Trump said. “And if I were president at the time, he would be alive today because unlike [Hillary Clinton] who voted for the war without knowing what she was doing, I would not have had our people in Iraq.”

Lehrich later apologized for the “inappropriate” language of the tweet.

I want to apologize for the clearly inappropriate nature and language of this personal tweet. Sorry all. — Jesse Lehrich (@JesseLehrich) October 10, 2016

Too bad screen shots are forever.