Jesse Lehrich, a foreign-policy spokesman for Hillary Clinton’s presidential campaign, told Republican presidential nominee Donald Trump “go fuck yourself,” after he reiterated his longstanding claim that Capt. Humayun Khan, who was killed in Iraq in 2004, wouldn’t have died if he were commander-in-chief. “Hey @realDonaldTrump—regarding your claim that Captain Khan would be alive if you were president: go fuck yourself,” Lehrich wrote on Twitter. The tweet was retweeted nearly 3,000 times before Lehrich issued an apology in a subsequent tweet: “I want to apologize for the clearly inappropriate nature and language of this personal tweet. Sorry all.” Khan’s parents were featured at the Democratic convention in July in an attempt to rebuke Trump for his rhetoric on Muslims.