Indiana state Sen. Travis Holdman lost his primary on Tuesday, NBC News projects, the first victory of the night for President Donald Trump as he seeks to exact revenge against Republican incumbents w...

Primary races to watch: Indiana Republican state senators, who voted down last year’s GOP redistricting plan endorsed by Donald Trump, are today facing challengers backed by the president.

The president backed Republican challengers to seven state senators who bucked his redistricting efforts last year.