"I've always wanted to get a Purple Heart. This was much easier," Trump told his supporters.
Double amputee Iraq War veteran and Democratic Illinois congresswoman Tammy Duckworth responded to his remarks, tweeting a photo of her own Purple Heart with the caption "There's nothing easy about it."
Duckworth is running for U.S. Senate against GOP incumbent Sen. Mark Kirk who is not supporting Trump's presidential campaign.
The Iraq veteran who gave Trump the Purple Heart said he supports him.
"One hundred percent, I'm behind him. I know other veterans that are behind him. I'm just glad that I could do my little part," he said.
The Purple Heart wasn't the only headline to emerge from that rally, as Trump was interrupted by a crying baby.
"Don't worry about that baby. I love babies, I love babies!" Trump said. But one minute later, he took it back.
"Actually I was only kidding. You can get the baby out of here. That's alright. Don't worry. I think she really believed me, that I loved having a baby crying while I'm speaking. That's okay," Trump said.
President Obama also had strong words for Trump Tuesday, declaring publicly the candidate isn't fit to hold the office of the presidency and calling out Republicans.
"If you are repeatedly having to say in very strong terms that what he has said is unacceptable, why are you still endorsing him?" President Obama asked.