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Tuesday marks the final major test of tea party power in the primaries, as challengers try to capitalize on anti-incumbent sentiment in Alaska, Arizona and Florida, and incumbents hope to avoid becoming the latest victims in what's been a rough year for officeholders.
The Sunshine State holds the most intrigue, featuring a battle for the GOP's gubernatorial nomination between longtime state Attorney General Bill McCollum and businessman Rick Scott, who on Monday won the backing of the Florida Tea Party.
On the other side of the aisle, Rep. Kendrick B. Meek is trying to fend off another businessman and political newcomer, Jeff Greene, in the Democrats' Senate primary. Meanwhile, in Arizona, Sen. John McCain appears poised to head off a challenge from a former Republican congressman, and former Gov. Sarah Palin in Alaska has put her credibility and political clout on the line by backing an unheralded challenger to incumbent and in-state rival Sen. Lisa Murkowski.
Palin has become a synonym for tea party power, thanks in part to her high-profile endorsements of insurgent conservative candidates. But she is taking her biggest gamble Tuesday when the candidate she has endorsed, Joe Miller, faces off against the better-funded Murkowski.
Palin has recorded an automated phone message in an effort to bring out voters. She said Murkowski, who is in her second term, is the most liberal of any incumbent Republican senator up for re-election this year. Palin also has taken to her Facebook page to urge support for Miller.
"Our country does not need another Democrat in the Senate voting for the Obama agenda, which is bankrupting us," she said, pleading for her supporters to contribute to Miller's campaign for a last-minute push.