Meanwhile, a group of military veterans is calling on Arizona Senator John McCain to withdraw his endorsement of Donald Trump after Trump attacked the Khans, the parents of a U.S. Army captain who died serving in Iraq in 2004. McCain served in the U.S. Navy and was held as a prisoner of war in Vietnam. The veterans announced their initiative at a press conference Thursday in Washington, D.C. This is Marine veteran Alexander McCoy.

Alexander McCoy: “Senator McCain, this is my message to you. You served and you sacrificed in ways Donald Trump cannot begin to understand. You have heard enough, too. Now, I am joining, and I am proud to join, hundreds of—a hundred thousand veterans, military family members and voters across this country in demanding that you, John McCain, act. We cannot afford Donald Trump to be our commander-in-chief.”

Trump has previously attacked McCain and his military record, saying, “I like people who weren’t captured.” McCain has so far refused to retract his endorsement of Trump. But he became evasive on Wednesday when asked by a reporter about the idea of Trump having control of nuclear weapons. This clip starts with the reporter.

Reporter: “Are you comfortable with Donald Trump possibly having control of the nuclear arsenal?”

Sen. John McCain: “Anyone that the people of this country choose to be the commander-in-chief and the president of the United States, therefore, can lead this country and will lead in a responsible fashion—anyone who is elected president fairly in this country. And that’s the way that our democratic system works.”