Other Republicans also joined their leaders in a rebuke of Trump.
"This is so incredibly disrespectful of a family that endured the ultimate sacrifice for our country," tweeted former Florida Gov. Jeb Bush.
"I am appalled that Donald Trump would disparage them and that he had the gall to compare his sacrifices to that of a Gold Star family," said Sen. Kelly Ayotte (R-NH).
Democrats not only condemned Trump, but they also reminded top Republicans that they are backing the real estate mogul in November.
As for Trump, he wasn't backing down.
Late on Sunday though, Trump's running mate released a statement that seemed to be an effort at damage control:
"Donald Trump and I believe that Captain Humayun Khan is an American hero and his family, like all Gold Star families, should be cherished by every American.
Captain Khan gave his life to defend our country in the global war on terror. Due to the disastrous decisions of Barack Obama and Hillary Clinton, a once stable Middle East has now been overrun by ISIS. This must not stand.
By suspending immigration from countries that have been compromised by terrorism, rebuilding our military, defeating ISIS at its source and projecting strength on the global stage, we will reduce the likelihood that other American families will face the enduring heartbreak of the Khan family.
Donald Trump will support our military and their families and we will defeat the enemies of our freedom."
- Governor Mike Pence
Meanwhile on Monday morning, Sen. John McCain (R-AZ) weighed in with his own rebuke of Trump: