Temper tantrum.

(Politico) — President Barack Obama abruptly walked out of a debt-limit meeting with congressional leaders Wednesday, throwing into serious doubt the already shaky debt limit negotiations, according to House Majority Leader Eric Cantor (R-Va.) and a second GOP source.

Cantor said the president became “agitated” and warned the Virginia Republican not to “call my bluff” when Cantor said he would consider a short-term debt-limit hike. The meeting “ended with the president abruptly walking out of the meeting,” Cantor told reporters in the Capitol. “I know why he lost his temper. He’s frustrated. We’re all frustrated.”

Asked if they’d made progress in the lasted of negotiations, House Minority Leader Steny Hoyer said “No.”

Update: More details.

On a day when the Moody’s rating agency warned that American debt could be downgraded, the White House talks blew up amid a new round of sniping between Obama and Cantor, who are fast becoming bitter enemies.

When Cantor said the two sides were too far apart to get a deal that could pass the House by the Treasury Department’s Aug. 2 deadline — and that he would consider moving a short-term debt-limit increase alongside smaller spending cuts — Obama began to lecture him.

“Eric, don’t call my bluff,” the president said, warning Cantor that he would take his case “to the American people.” He told Cantor that no other president — not Ronald Reagan, the president said — would put up with the treatment he was getting from the House majority leader.