President Donald Trump's demands for revenge from Indiana Republican legislators, who previously resisted his political demands from the president, may be thwarted by Republican voters in the state's May 5 primary after they voted down his demand to redraw Indiana's congressional map to help the GOP win two more seats in November's midterm elections. The president has endorsed challengers to seven incumbent Republican state senators who voted against the redistricting measure. The outcome of the Senate primaries will determine whether the GOP can retain its narrow House majority or oust those he sees as disloyal and damaging to his second-term agenda. Despite months of lobbying from Trump, the state Senate’s vote in December indicated that the national redistricting effort was not going according to plan for the president. The state Senate GOP's campaign arm has already spent $1.8 million between the start of 2026 and the April 10 pre-primary filing deadline for the election, with six competitive state Senate races exceeding $1 million in TV ad spending.