Seven Republican state senators battle for re-election against candidates backed by Donald Trump

Indiana voters go to the polls today in a test of Republican staying power after the party’s state lawmakers resisted Donald Trump’s bruising campaign to pressure them into redrawing the congressional districts.

The vote has turned into a statewide referendum on political retribution.

Seven state senators who voted against Trump’s mid-decade redistricting push now face challengers endorsed by the president, who said that “every one of these people should be ‘primaried’” after the effort failed.

Trump-aligned dark money groups have spent upwards of $7m on TV ads in Indiana this year, according to a tally from AdImpact – the majority spent targeting Republicans who allied themselves with Democrats in the December redistricting vote.