Donald Trump's approval rating may be sinking, but RNC Chairman Joe Gruters tell Newsweek his base will define the party's future.

The GOP’s first midterm convention closes Thursday in Dallas with JD Vance and President Trump, and a Texas lineup.

The RNC's Midterm Convention brings President Trump, thousands of visitors, road closures, heightened security and protests to Dallas.

“If you're going to defy history, you can't do what they've always done in the past," Joe Gruters told Newsweek.

RNC Chairman Joe Gruters is betting on a Dallas convention and state party training to help Republicans keep control of Congress, but some Republicans remain sceptical of the plan.

The full Supreme Court on Thursday morning ruled against the GOP-favored Missouri congressional map. In a brief and unsigned opinion, justices sided with a Democratic-aligned organizer, who is attempting to defeat the Republicans’ map by putting it to voters through a referendum.

Republican National Committee Chair Joe Gruters started the convention Wednesday by saying the GOP had one mission: “defying history.” That history is that the party that controls the White House almost always loses seats in midterm congressional elections.

At the GOP midterm convention in Dallas, Senator Tim Scott (R) South Carolina delivered a fiery speech aimed at democrats.