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The battle for the Senate kicks off (Thursday’s Trail Mix video)

at 08:36 AM ET, 04/12/2012

Just as the Republican presidential primary has begun winding down, the race for the Senate is heating up. The National Republican Senatorial Committee has reserved $25 million in airtime, Roll Call’s Shira Toeplitz reports. Which states will be the major battlegrounds? Today’s Trail Mix video takes a look:

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