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King, a Tea Party favorite, has been leaning towards a run, however. Polls show that he'd struggle against Democrats' likely nominee, Rep. Bruce BraleyBruce Lowell BraleyOPINION | Tax reform, not Trump-McConnell feuds, will make 2018 a win for GOP Ten years later, House Dems reunite and look forward Trump: Ernst wanted 'more seasoning' before entertaining VP offer MORE (D-Iowa). Braley has led King by a wide margin in a number of polls, and while he's also led Reynolds in polling, it's a closer race with more undecided voters.