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The states in the middle of the Interstate 70 corridor represent a strikingly cohesive group of voters who were instrumental to the Democratic sweep of Congress in 2006 and President Obama's election in 2008. The results of the 2010 midterm elections here will have great influence over who holds power in Washington next year, and ultimately who sits in the Oval office after 2012. Use this map to explore the region's key congressional races:

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*Incumbent. NOTE: FEC Data as of
. SOURCE: Federal Election Commission. GRAPHIC: Wilson Andrews, Dan Keating, Gene Thorp and Karen Yourish.
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