ABC's This Week aired an interview with Democratic presidential candidate Sen. Bernie (I-Vt.) on Sunday, in which Sanders spoke with ABC News' chief White House correspondent, Jonathan Karl, about a variety of subjects. The interview took place in Des Moines, Iowa, where Sanders was campaigning. Here are three moments that stand out from the interview.

Biden's no match for Sanders' progressivism — Sanders challenged the notion that former Vice President Joe Biden is one of the more progressive Democrats running for the Oval Office. He cited Biden's history of voting for the Iraq War and the deregulation of Wall Street as major reasons.

Bernie Sanders on Joe Biden saying he's most progressive: "Joe voted for the war in Iraq. I led the effort against it… Joe voted for the deregulation of Wall Street, I voted against that… I don't think there's much question about who's more progressive" https://t.co/d1DwL6E3Jr pic.twitter.com/uiCrdJ6JYA — This Week (@ThisWeekABC) May 5, 2019

Trump is not wrong on North Korea — Sanders is at odds with President Trump in most cases, but he does think the president's plan to sit down with North Korean leader Kim Jong Un and solve the issue with diplomacy is the way to go.

"This is one area, actually, where I do not fault Trump," Sen. Bernie Sanders says on North Korea.



"I think the idea of sitting down with Kim Jong Un is the right thing to do. It is very, very difficult, but clearly they are a threat to the planet." https://t.co/y5x7H4hpJY pic.twitter.com/7P16ml5WR4 — This Week (@ThisWeekABC) May 5, 2019

He doesn't want to criticize his opponents — Sanders told Karl he hopes the Democratic primaries are about issues and not personal attacks. He kept to that line of thinking during the interview, refusing to criticize some of his fellow candidates’ inexperience and praising competitor Sen. Elizabeth Warren (D-Mass.). Tim O'Donnell