A number of primaries are being held today and the outcome will have a great effect on the next Senate. Specter is facing a primary challenge from Sestak on the Democratic line. Specter switched parties and a loss in this primary will end his service in the Senate. Another race to watch is that of Democrat Blanche Lincoln in Arkansas. A victory in the race with less than 50% will lead to a June 8th run-off election.
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