WASHINGTON – Voters cast their ballots in four primary states on Tuesday, helping set the stage for the November general elections that will decide control of Congress — and the fate of President Joe Biden's agenda in the second half of his term.

Races across South Carolina, Maine, Nevada and North Dakota feature candidates from the Trump-backed to the Trump-opposed, underscoring how much of the primary races are in fact a chance for Republican voters to shape the party's future relationship with the ex-president.

Texas rounds out the day with a special congressional election.

South Carolina Republican Sen. Tim Scott easily wins primary

Incumbent South Carolina Sen. Tim Scott, facing no Republican opposition, won the Senate GOP primary Tuesday night.

Scott is running for a second full six-year term. Scott said the 2022 run will be his last.

Meanwhile three women are running in the Democratic Senate primary. The winner will face Scott in the general election

Texas is having a seemingly low-stakes election. The GOP is pouring their all into it.

In South Texas, a special election is being held to determine who will serve the remainder of Democratic Rep. Filemon Vela Jr., who resigned from the seat to join a lobbying firm. While the winner of this election only serves until January, Republicans are seeking to prove they can make inroads in what has been a traditionally blue area.