Bob Perry, the Houston homebuilder who led the drive to discredit Democratic presidential nominee John Kerry's war record in 2004, has replaced George Soros as the biggest donor in U.S. politics.

Perry, 74, has given at least $9.2 million to groups backing Republican House and Senate candidates, Federal Election Commission records show. In 2004, Soros, 76, was the top contributor, giving at least $27 million in an effort to defeat President George W. Bush.

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