Donald TrumpDonald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE on Saturday pushed back against Democratic National Convention speaker Khizr Khan's claim that Trump has “sacrificed nothing” for his country.

Khan's son, a U.S. soldier, was killed in Iraq in 2004.

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When asked about his personal sacrifices for the country in an interview with ABC News, Trump, the Republican presidential nominee, said he has made sacrifices through his work.

“I think I've made a lot of sacrifices. I work very, very hard. I've created thousands and thousands of jobs, tens of thousands of jobs, built great structures. I've had tremendous success. I think I've done a lot,” Trump said.

Trump cast doubt on whether Khan's moving remarks were his own words. 

“Who wrote that? Did [Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE's] scriptwriters write it?” he said.

Trump also questioned whether Khan's wife, Ghazala Khan, who appeared on stage with him during the speech, was allowed to speak, seemingly questioning whether the family's Muslim faith restricted her role.

“If you look at his wife, she was standing there. She had nothing to say. She probably — maybe she wasn't allowed to have anything to say. You tell me,” he said.

During his rousing speech, Khan took out a copy of the Constitution from the inside of his coat and asked Trump if he had ever read it.

“Go look at the graves of brave patriots who died defending the United States of America,” he said. 
 
“You will see all faiths, genders and ethnicities. You have sacrificed nothing and no one.”