Longtime ​Clinton ​confidante ​James Carville says Vice President Joe Biden ​has a “track record” of losing.

“He’s done it twice, and he hasn’t had the best track record doing it,” James Carville said Sunday​ ​of Biden’s previous presidential runs, speaking on​ John Catsimatidis’​ AM 970​ radio show​.

Biden, 72, is mulling another presidential run and met Saturday with progressive darling Sen. Elizabeth Warren (D-Mass.), who has notably refrained from endorsing Democratic front-runner Hillary Clinton.

The movement to draft Biden has gained steam as Clinton continues to be dogged by a federal investigation into her home-email server for transmitting potentially classified material.

California Gov. Jerry Brown Biden said Biden should give “very serious consideration” to jumping in and conceded he could usurp Clinton for the nomination.

“All I can say is, if I were Hillary, I would say [to Biden], ‘Don’t jump in.’ If I were Joe Biden, I’d probably give it very serious consideration,” Brown said in an interview that aired Sunday on NBC’s “Meet the Press.

Carville, a longtime adviser of Bill and Hillary, admitted the Clinton campaign has problems. “I don’t hold to any illusions that this is going to be some kind of an easy straight shot open thing,” Carville said.

But he insisted the investigation over the emails will amount to nothing. “At the end of the day, they’ll find out there wasn’t anything to this.”

For the last week Biden has been home in Delaware debating whether to run for a third time. He left seclusion Saturday to travel to Washington for lunch with Warren, an influential Democratic senator who gained progressive prominence for her relentless advocacy for Wall Street reform. Biden then headed back to his Wilmington home where he’s been huddling with family and top aides.

Recent polling by Quinnipiac University in swing states of Ohio, Pennsylvania and Florida show Biden did as well or better than Clinton in head-to-head matchups with GOP candidates.

GOP front-runner Donald Trump said Sunday Biden would “equal” Clinton as an opponent.

“I think they’re the same. I think that Hillary may be very damaged, however, George, because of the email thing,” he told ABC’s George Stephanopoulos on “This Week.” “… Assuming she could get over that, which I just don’t know how she possibly can, … I would say it would be pretty equal.”

Former Maryland Gov. Martin O’Malley, who has been trailing Clinton and independent Sen. Bernie Sanders, in the polls, said he’d welcome Biden’s “wisdom and experience” into the Democratic race.

“It would be nice to have at least one more lifelong Democrat in the race,” O’Malley said on ABC’s “This Week.”

Asked if that was a shot at Bernie Sanders, a self-described socialist who has been drawing thousands to his rallies, O’Malley replied: “No. It’s a compliment to Vice President Biden for also being a lifelong Democrat.”

Biden is expected to make his decision in September — in advance of the first Democratic presidential debate Oct. 13.