It was the ultimate test of President Donald Trump's endorsement: low-level Indiana state Senate primaries. Here's how those races played out.

A majority of Republican state senators whose opponents were endorsed by President Donald Trump lost on Tuesday, dealing the president wins in a deep red state just four months after lawmakers rejected his redistricting plan.

Indiana Republican state Sen. Travis Holdman lost Tuesday to a challenger backed by President Donald Trump. The race is the first of seven Indiana Republican primaries on Tuesday that are testing the limits of Trump’s influence in a deep red state.

Republicans are keeping a close eye on Ohio and Indiana on Tuesday as voters cast their ballots in state and congressional primaries. CBS News' Fin Gómez has all the key details.

The Cook Political Report rates the Indiana 8th District race as Solidly Republican, so the winner of this primary is expected to have a strong advantage in November. Erica L. Green President Trump signed a proclamation recognizing the new,

Live results from the Indiana Senate races where President Donald Trump made endorsements based on redistricting votes.

But several other Trump-backed candidates for state Senate claimed success Tuesday night over opponents who resisted redistricting efforts.

Voters will head to the polls in Indiana’s state senator primaries and Ohio’s primaries for governor and the special Senate race to fill Vice President JD Vance's term. NBC News’ Shaquille Brewster reports on how voters are responding to President Donald Trump’s push to oust opponents in Indiana to his redistricting push.