This Oct. 20, 2016 photograph shows Montana Republican U.S. Rep. Ryan Zinke waving to passing traffic in Billings, Mont., as he campaigns for re-election to a second term as the state's sole representative in the U.S. House. Zinke's being challenged in the Nov. 8 election by state Superintendent of Public Instruction Denise Juneau. (AP Photo/Matthew Brown)
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