The battle for the presidency and the Senate in 2012 are deeply intertwined, with as many as nine states expected to be central to both contests.
The national map shows four competitive Senate races featuring Democratic incumbents in states that have been at or near the center of the race for the presidency in the past several elections and will be so again in the next one.
In Florida, Sen. Bill Nelson is certain to face his toughest challenge since winning his seat in 2000. Sensing his vulnerability — and the importance of the state to the White House’s 2012 electoral calculus — President Obama held a fundraising event for Nelson earlier this month and Vice President Biden will do so this week.
The story is the same in Missouri, where Sen. Claire McCaskill, a strong Obama ally, is seeking a second term, and in Ohio, where Sen. Sherrod Brown is up for reelection. Both states were heavily targeted by Obama in 2008, and they will be again by both him and the eventual Republican nominee. Ditto Michigan, where a struggling economy could complicate Sen. Debbie Stabenow’s reelection bid as well as Obama’s path to victory in the state.
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