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Sen. Joni Ernst (R-Iowa) has won re-election against Democratic challenger Theresa Greenfield, AP projects.
Why it matters: Democrats had hoped to flip Ernst's seat in their bid to win control of the Senate.
- Cook Political Report had rated the Iowa Senate race as a toss-up.
- Ernst, who was first elected to the Senate in 2014, has branded herself as a steady conservative vote and close ally to President Trump.
