The special election on Tuesday in Pennsylvania’s 18th Congressional District, in the western part of the state, will put Republicans to the test in a part of the country that President Trump has made central to his message. The FiveThirtyEight Politics podcast crew discusses the candidates, expectations and political environment in what looks to be a close race. The team also debates the political implications of the “Trump economy” after a positive jobs report, increased popular support for the GOP tax law and the administration’s move to levy tariffs on steel and aluminum.

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