Yesterday's primary elections have reaffirmed the danger faced this year by congressional incumbents and candidates who were hand-picked by national party leaders.
Democratic voters in Pennsylvania rejected Sen. Arlen Specter, while Arkansas Democrats forced Sen. Blanche Lincoln into a run-off. And in Kentucky, Rand Paul -- with the backing of the tea party -- is the GOP nominee in the Senate race.
Congressman Joe Sestak is now the Democratic nominee in Pennsylvania, as voters rejected the 80-year-old Specter in his first Democratic campaign. Sestak faces Republican Pat Toomey in the fall election.
In Kentucky, Paul says his win in the Republican primary for a Senate nomination is a "tremendous mandate for the tea party." The political newcomer beat Republican establishment favorite Trey Grayson.
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