Pictured: a very serious adult.

Tanman (R-OH), who as a Republican member of Congress helped put the Bush tax cuts, two unfunded wars, Medicare Part D and TARP on the country’s credit card — now blames Obama for not cleaning up the mess faster.

Boehner said on CBS’s “Face the Nation” that the president so far is “really not serious about tackling the big problems.”

“He’s talking about it, but I’m not seeing real action yet, and I think this is the moment,” he added.

On dealing with major spending issues, including entitlement programs, Boehner invited the president to “lock arms and we’ll jump out of the boat together.

“I’m serious about dealing with this, and I hope he’s just as serious,” he said.

As both parties haggle over raising the $14.3 trillion debt limit, Boehner insisted that everything was up for discussion — except tax hikes.

“Now is the time to deal with the fiscal problems we have in an adult-like manner,” he said. “Everything should be on the table except raising taxes.”

Well, duh.

What kind of unserious child thinks increasing revenues could help lower the debt?