Republican Senator Richard Lugar will probably be one of the last relatively sane GOP politicians thrown under the bus by the Tea Party wackos — they’ve already purged most of the non-crazies: Senator Lugar Charts His Course Against the Winds.

Mr. Lugar’s willingness to buck his party is leading to talk that he will face a primary challenge from a Tea Party candidate when he runs for re-election in 2012. It is a possibility that Mr. Lugar, who said the current environment in Washington was “disappointing” and “without a doubt” the most polarized he had seen since joining the Senate in 1977, understands clearly even as he declines to modify his positions. …

Even after the midterm rout that will remove many long-serving members from Congress, the idea that Mr. Lugar would be vulnerable to a primary challenge is a chilling notion to many Republicans, a symbol of symbolism gone too far.

“If Dick Lugar,” said John C. Danforth, a former Republican senator from Missouri, “having served five terms in the U.S. Senate and being the most respected person in the Senate and the leading authority on foreign policy, is seriously challenged by anybody in the Republican Party, we have gone so far overboard that we are beyond redemption.”