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First congressman casts his lot for Hayworth in Ariz. Senate primary

A GOP congresman on Sunday backed former Rep. J.D. Hayworth (R-Ariz.) who announced yesterday he will primary Sen. John McCain (R-Ariz.)

Rep. Dana Rohrabacher (R-Calif.) became the first lawmaker to endorse the former radio host Hayworth's upstart bid.

In a Twitter post, Rohrabacher said:

McCain's wrong on too many big issues: #Immigration, #GlobalWarming, #Bailouts. @JDHayworth is better #AZ #tcot #Hayworth

Hayworth informed the Associated Press late Friday that he was stepping down as host of an Arizona talk radio program to run for Senate against the 2008 GOP presidential nominee.

By law, Hayworth could not remain a radio host and run for Senate.

The former congressman is challenging McCain from the right.

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