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LOUISVILLE, KY - NOVEMBER 4: Senate Minority Leader U.S. Sen. Mitch McConnell (R-KY) holds his ballot after voting in the midterm elections at Bellarmine University November 4, 2014 in Louisville, Kentucky. McConnell is running in a tight race against opponent Kentucky Secretary of State Alison Lundergan Grimes. (Photo by Aaron P. Bernstein/Getty Images)
LOUISVILLE, KY - NOVEMBER 4: Senate Minority Leader U.S. Sen. Mitch McConnell (R-KY) holds his ballot after voting in the midterm elections at Bellarmine University November 4, 2014 in Louisville, Kentucky. McConnell is running in a tight race against opponent Kentucky Secretary of State Alison Lundergan Grimes. (Photo by Aaron P. Bernstein/Getty Images)

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    Exit polls: Why Mitch McConnell won

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Exit polls: Why Mitch McConnell won

CNN's John King looks at how Senate Minority Leader Mitch McConnell was able to win over Kentucky voters.

Exit polls: Why Mitch McConnell won

CNN's John King looks at how Senate Minority Leader Mitch McConnell was able to win over Kentucky voters.