"I think if you look at Joe's record and you look at my record, I don't think there's much question about who's more progressive", Sanders told ABC News on Sunday.
"There's so many nicknames I'm inclined to give this guy".
"What I would say when I'm president to Vladimir Putin is that we've got your number, I've got the Federal Bureau of Investigation after you, I've got the Central Intelligence Agency looking at all of this, I've figured out what you guys are up to and we're going to protect our elections and we're going to put increasing sanctions on against you".
President Donald Trump has been quick to cook up derisive nicknames for his Democratic critics and rivals: "Crooked" Hillary Clinton, "Goofy" Elizabeth Warren and "Crazy" Bernie Sanders, among others. She's a serious candidate. We have differences; we agree on a lot of things. He did, however, share his view that the process needed reform.
As Sanders moved onto his final stop of a two-day Iowa visit on Sunday evening, Brix lingered behind and pondered the exchange. On Saturday, he was mobbed by crowds as he walked through Des Moines' downtown farmer's market, less than three years after he shocked the Democratic establishment by falling less than one-half of a percentage point from winning the Iowa caucuses - a moment he describes in his current stump speech as one that jump-started the party's progressive movement.
Body Recovered From 'Ground Shaking' Explosion In Waukegan, 2 Still Missing
He says crews have suspended their search for the other two workers due to concerns about the stability of the structure. An explosion rocked a town in IL , leaving four people injured and several others unaccounted for, authorities said .
"Person of color?" Karl asked. "I'm sure he will take all the credit that he wants", Sanders said.
"I think they should be able to vote from prison".
"It would be silly to make that statement right now", he added.
Former Vice President Joe Biden charged Saturday that Jim Crow is "sneaking back in" as he emphasized the need to ensure voting rights are protected, which he said is lacking under the Trump administration.
Sanders called North Korea "a threat to the planet" and said the US has to do everything possible to have China and others in the region put pressure on the North and "make it clear that they can not continue to act this way".