What would it take for Republican leaders to fully repudiate Donald Trump?

Khizr Khan, the father of fallen Army Capt. Humayun Khan, has called repeatedly for Republican leaders to condemn their nominee’s repeated attacks on his family and Muslim faith. Khan’s tearful pleas have been met instead with carefully worded statements that have largely fallen short.

“There had been some statements coming from the Republican leadership. But there is amazing silence. Silence of rebuke, silence of asking no more,” Khizr Khan said Monday on MSNBC’s “Morning Joe.” The party’s nominee has repeatedly attacked Khizr Khan and his wife, Ghazala Khan, since they appeared the Democratic National Convention to condemn the candidate’s proposed temporary ban on allowing Muslims to come to the U.S.

That ban would have prevented the Khans from immigrating to the nation their son, Capt. Humayun Khan, served while deployed in Iraq, where he died trying to stop a suicide bomber and was posthumously awarded a Purple Heart and Bronze Star.