Senator John McCain and other Republican leaders have condemned Donald Trump’s remarks about the family of a fallen US Muslim soldier.
Mr McCain said Mr Trump did not have an “unfettered license to defame those who are the best among us”.
Mr Trump has come under fire for criticising the Muslim American parents of a US soldier killed in Iraq.
Democratic lawmakers and the soldier’s father have called on Republicans to disavow Mr Trump.
“I cannot emphasize enough how deeply I disagree with Mr. Trump’s statement,” Mr McCain said in a statement.
“I hope Americans understand that the remarks do not represent the views of our Republican Party, its officers, or candidates.”
Mr McCain, a war veteran and the party’s 2008 presidential nominee, thanked the Khan family for immigrating to America, adding “we’re a better country because of you.”
Last year Mr Trump sparked a backlash after he said Mr McCain was not a war hero because he was captured in Vietnam.
The latest escalation comes as Republican leaders have stepped forward to rebuke Mr Trump’s fight against the Gold Star parents.
In the US, parents who have lost a child in war are known as Gold Star families.
Reaction to Mr Trump’s comments
- South Carolina Senator Lindsey Graham, Mr Trump’s former primary opponent, said: “‘Unacceptable’ doesn’t even begin to describe it.”
- House Speaker Paul Ryan condemned any criticism of Muslim Americans who serve their country, but avoided mentioning Mr Trump.
- Ohio Governor John Kasich tweeted: “There’s only one way to talk about Gold Star parents: with honour and respect.”
- Former Florida Governor Jeb Bush called Trump’s remarks “incredibly disrespectful.”
- Veterans of Foreign Wars President Brian Duffy: “Election year or not, the VFW will not tolerate anyone berating a Gold Star family member”
The couple’s son, US Army Capt Humayun Khan, was killed by a car bomb in 2004 in Iraq at the age of 27.
Pakistani-born Khizr Khan and his wife, Ghazala Khan, appeared at the Democratic National Convention in Philadelphia last week to speak about their son’s sacrifice.
In an emotional speech, Mr Khan said his son would not even have been in America if it had been up to Mr Trump, who has called for a ban on Muslims entering the US.
In an interview with ABC’s This Week, Mr Trump suggested Mrs Khan may have not been allowed to speak.
“She had nothing to say… Maybe she wasn’t allowed to have anything to say. You tell me.”
Mrs Khan fired back in opinion article for the Washington Post, saying she was too upset to speak at the convention.
She said Mr Trump was ignorant about Islam and did not know the meaning of the word sacrifice.
“Walking on to the convention stage, with a huge picture of my son behind me, I could hardly control myself. What mother could? Donald Trump has children whom he loves. Does he really need to wonder why I did not speak?” she wrote.
On Monday, family members of eleven service-members killed in action wrote to Mr Trump, expressing dismay at his treatment of the family of Humayun Khan, and demanding an apology.
“When you question a mother’s pain, by implying that her religion, not her grief, kept her from addressing an arena of people, you are attacking us. When you say your job building buildings is akin to our sacrifice, you are attacking our sacrifice,” their letter said.
“This goes beyond politics. It is about a sense of decency. That kind decency you mock as ‘political correctness’,” it went on to say. BBC
