Rep. Eugene Vindman (D-VA) joins MSNBC’s Ali Velshi to discuss Donald Trump’s shifting explanation of the Ukraine weapons pause and why, according to Rep. Vindman, it’s “dangerous” that our “Commander-in-Chief is the last to know.

A new book alleges that President Donald Trump told donors he threatened Russian President Vladimir Putin with bombing Moscow if Russia invaded Ukraine.

Following the Pentagon announcing a pause on weapons, the U.S. president said Ukraine must defend itself from Russia.