The GOP’s new partisan warrior: John McCain?

At least one senator isn’t very forgiving of the straight-shooting, hot-tempered McCain. In October, McCain ripped Sen. Barbara Boxer on the campaign trail for being the most “anti-defense senator” and accused her of endangering national security — and the California Democrat is still ticked off.

“He makes things up. He loses control. That was an example,” she said in an interview.

When asked whether he still believes what he said about Boxer, McCain said, “Sure.”…

Some in the Senate wondered if the newly emboldened Republican would return to his old, deal-cutting ways, bucking his party on measures like campaign finance reform.

But McCain may be more comfortable as an Obama antagonist — even though he says he’ll work with the president when they have common ground.