Former Vice President Joe Biden flopped last week in Iowa and things aren't looking much better in New Hampshire. In fact, earlier in the day, the former veep decided to move on to South Carolina, where he's been the frontrunner throughout the race.

His latest talking point focuses on taking down Sen. Bernie Sanders (I-VT), who is considered to be neck-and-neck with former South Bend, Indiana Mayor Pete Buttigieg. A couple of days ago he said it'd be very difficult for Democrats to run on the same ticket with Sanders if he ends up being the party's nominee.

"I think it's going to be incredibly more difficult," Biden told ABC News' ABC News' George Stephanopoulos. "I'm not gonna say – Look, if I don't get the nomination and Bernie gets it, I'm going to work like hell for him. But I tell you what. It's a bigger uphill climb, running as a senator or a congressperson or as a governor on a ticket that's called itself a socialist ticket.'"

Biden reiterated that position on Tuesday during an interview with CNN's Don Lemon.

"Bernie Sanders is a self-described 'Democratic Socialist.' He embraces that," Lemon said. You're concerned about that because you think it's harder for down-ticket, for governors, and mayors, and senators, to run with him at the head of the party saying that he's a Democratic Socialist. Shouldn't the voters decide?"

"Sure they will," Biden quickly replied. "What do you think – and I know you can't answer me – what do you think? We not only have to beat Trump we have to win back the Senate, like we did win back the House."

The former veep took credit for the House turning blue, saying he went into 24 different states and campaigned on behalf of 65 candidates.

"They asked me to come in in red states and in purple states, not blue states. And 41 of them won," he said. "The folks who won those races – they're on the line. They came and asked me to campaign for them. Did any ask Bernie to campaign?"

Biden reiterated his position that a Democratic Socialist at the top of the Democratic Party ticket wouldn't play well in swing states.

"The question is: who can help us win back the Senate the most?" he asked. "I know the south. You're going to walk into those states we have to win, like Florida and other places, that we're going to win in Georgia, in North Carolina and say, 'And, by the way, my president describes himself as a Democratic Socialist.' What do you think Trump will do with that?"