STAY OFF MCCAIN’S LAWN…. Sen. John McCain (R-Ariz.), his near-constant media attention notwithstanding, doesn’t seem to be having any fun.

Yesterday, the senator was all worked up about Medicare cost-savings, claiming not to know what “the deal is.” Sen. Max Baucus (D-Mont.) rose to explain it to him, and McCain didn’t take it especially well.

Note in the video that McCain is incensed by all the lobbyists in the halls of Congress. I guess he liked lobbyists better when he hired dozens of them to run his campaign operation last year.

The confrontation came a day after Senator Hothead told Don Imus, “I’m madder than I’ve ever been.” The comment came in response to a question about the economic recovery package, which McCain called an “outrageous use of taxpayers’ dollars.”

McCain, whose temperament has always been disturbing, is angrier now than he’s ever been because of a recovery package that rescued the economy from collapse? That seems odd.

I’m reminded of something Sen. Thad Cochran (R) of Mississippi said about his long-time colleague last year: “[McCain] is erratic. He is hotheaded. He loses his temper and he worries me.”

Our ideas can save democracy... But we need your help! Donate Now!

Follow Steve on Twitter @stevebenen. Steve Benen is a producer at MSNBC's The Rachel Maddow Show. He was the principal contributor to the Washington Monthly's Political Animal blog from August 2008 until January 2012.