Mr. Irrelevant.

(WaPo/Dana Milbank) — President Obama gave one of the most impassioned speeches of his presidency when he addressed a joint session of Congress on Thursday night. Too bad so many in the audience thought it was a big, fat joke.

“You should pass this jobs plan right away!” Obama exhorted. Sens. Bob Corker (R-Tenn.) and Lindsey Graham (R-S.C.) chuckled.

Warren Buffett pays a lower tax rate than his secretary — an outrage he has asked us to fix,” Obama went on. Widespread laughter broke out on the GOP side of the aisle. [they laughed because Buffet lives off dividends which are taxed at a lower rate than regular income — ed.]

“This isn’t political grandstanding,” Obama said. Rep. Paul Ryan (R-Wis.) guffawed.

“This isn’t class warfare,” Obama said. More hysterics on the right.

“We’ve identified over 500 [regulatory] reforms, which will save billions of dollars,” the president claimed. House Majority Leader Eric Cantor (R-Va.) and Whip Kevin McCarthy (R-Calif.) giggled.

It was, in a way, more insulting than Joe Wilson’s “you lie” eruption during a previous presidential address to Congress. The lawmakers weren’t particularly hostile toward the president — they just regarded the increasingly unpopular Obama as irrelevant. And the inclination not to take the 43-percent president seriously wasn’t entirely limited to the Republicans.

The nation is in an unemployment crisis, and Obama was finally, belatedly, unveiling his proposals, but Rep. Carolyn McCarthy (D-N.Y.) thought this joint session of Congress would be a good time to ask Secretary of State Hillary Clinton to autograph a copy of the children’s book “House Mouse, Senate Mouse.”. . .

Presidential addresses to Congress are often dramatic moments. This one felt like a sideshow. Usually, the press gallery is standing-room-only; this time, only 26 of 90 seats were claimed by the deadline. Usually, some members arrive in the chamber hours early to score a center-aisle seat; 90 minutes before Thursday’s speech, only one Democrat was so situated.

Obama spoke quickly, urgently, even angrily. Rep. Jesse Jackson (D-Ill.) stared at the ceiling. Rep. Peter Welch (D-Vt.) scanned the gallery. Rep. Jim Moran (D-Va.) was seen reading a newspaper. And Republicans, when they weren’t giggling, were mostly silent.