(CNN) -- Sen. Mitch McConnell trounced his tea party-backed opponent in Kentucky's Republican primary, leading a quartet of establishment GOP candidates to victories around the country Tuesday. After an expensive and bitter campaign, the Senate minority leader led defeated challenger Matt Bevin 60%-36%, with 97% of precincts reporting, according to numbers compiled by The Associated Press. In addition to Kentucky, more moderate candidates won in Republican Senate primaries in Georgia and Oregon and in a House showdown in Idaho. And the results in Kentucky, Georgia and Oregon could improve the GOP's chances of taking back control of the Senate come November's midterm elections.
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David Perdue and Jack Kingston will have a runoff in Georgia's GOP Senate primary
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In Oregon, Sen. Jeff Merkley, Dr. Monica Wehby win Democratic, GOP Senate primaries
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Six states held primary elections Tuesday
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Republican Sen. Mitch McConnell faces Democrat Alison Lundergan Grimes
The only states where the Democrats hope to play offense are Kentucky and @placeholder.