Republican presidential candidate and bombastic billionaire Donald Trump this week refused to rule out placing U.S. Muslims in a database and requiring them to carry special identification.

Sergeant Tayyib Rashid, a veteran of the Marine Corps, took exception to those comments and challenged Trump, posting a picture of his military ID on Twitter with the words, "I'm an American Muslim and I already carry a special ID badge. Where's yours?"

Rashid posted the tweet after Trump said he would require that Muslims in the United States would be tracked, according to the Daily Mail.