Sen. Tim Kaine (D-Va.) said Sunday that the difference between democratic and authoritarian regimes is that Russia and Iran would not tell the United States if there was going to be a terrorist attack in the U.S. Host Shannon Bream asked Kaine on “Fox News Sunday” whether the southern border can lead to “real danger” within the U.S., pointing to the attack in Russia that has left more than 133 dead in a Moscow concert hall. He first reiterated that the U.S. warned Russia about this kind of attack earlier this year.