Polls open across the US where key Senate and House races will decide which party controls Congress for remainder of Donald Trump’s second term

Rachel Leingang, a Midwest political correspondent for Guardian US, has been in Iowa, getting a sense of the political mood ahead of the crcuial elections:

Across Iowa on Monday, candidates made final pitches in a set of toss-up races up and down the ballot, noting just how close these contests are and how pivotal the state could be for the nation’s politics.

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