South Carolina voters will choose nominees for governor and other offices in a state primary on Tuesday, the latest test of President Donald Trump's sway over Republican voters.

Democrats in both gubernatorial and Senate primaries have criticized what they see as failures of South Carolina's GOP-dominated leadership.

Any indication of tepid support for Graham Platner, a Democratic candidate for Senate in Maine, will be seen as a warning sign about his chances against Senator Susan Collins, the Republican incumbent.

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