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The Obama factor in the 2014 midterm election

Midterms are always seen as a referendum on the incumbent president. It hasn’t helped Democrats that Obama’s approval ratings are lower than they were in 2010.

US President Barack Obama speaks during a rally at North Division High School on Oct. 28, 2014 in Milwaukee, Wis. (Photo by Brendan Smialowski/AFP/Getty)
US President Barack Obama speaks during a rally at North Division High School on Oct. 28, 2014 in Milwaukee, Wis.AFP/Getty Images

NBC News Election Unit