"In my opinion, the biggest problem our country has, the biggest problem the world has, is nuclear weapons," Trump said on Thursday. "They are a destructive force, the likes of which nobody has ever seen before, and we have to make sure they're never used."
Trump said he'd be able to help maintain stability around the world by keeping lines of communication open, adding "I could do it with telephone calls, by being smart."
Trump mentioned that the United States and Russia are the biggest nuclear powers, but expects that China will catch up in about five years as it builds up its nuclear arsenal.
Trump is expected to enter arms control talks with Russia if he returns to the White House after the November election.