After weeks of historic progress, North Korea is now threatening to withdraw from the summit with President Donald Trump.

The rogue nation is apparently upset over America and South Korea conducting military exercises.

On Tuesday, Bret Baier, Chief Political Anchor for Fox News and Anchor of Special Report, sat down with Tom Shillue to discuss the breaking news.

Baier, who is also the author of "Three Days in Moscow: Ronald Reagan and the Fall of the Soviet Empire", said history proves North Korea is hard to trust, but it's possible that may be part of Kim Jong Un's strategy to gain leverage over the Americans.