Joe Miller, the Alaska Tea Partier who defeated Republican senator Lisa Murkowski in the 2010 GOP primary but was defeated by Murkowski's write-in campaign in the general election, is seeking the GOP nomination again in 2014. Miller is unlikely to win Tuesday's primary, but he has caused some heartburn for Republicans by declining to say if he'd back the eventual GOP nominee.

The AP reports that at last night's debate Miller finally promised to support the Republican nominee in order to defeat Democratic senator Mark Begich:

For months, Miller, a tea party favorite, said he would not commit to supporting either Lt. Gov. Mead Treadwell or former Alaska Attorney General Dan Sullivan should they win, stoking fears that the party would be divided in a race that Republicans see as key to their efforts to win back control of the Senate. In a radio interview earlier in the day Thursday, Miller remained noncommittal.

But near the end of a televised debate Thursday night, the last debate before the primary, Miller said he believed he will win and would do everything he could to see that incumbent Democratic Sen. Mark Begich is defeated come November.

"But if one of you two guys, I've never said this before, I'll support you guys. I will," he said. "We've got to get rid of Begich. There's no question about it."

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