If Tim Scott had any brains in his head he'd be a Democrat. Steve King/Trumpian racial politics will become the new norm. As America becomes less white, the Republican Party will have to win a bigger share of the white vote to stay relevant. That means they'll become more extreme, more racist, and more openly and overtly expressing white supremacist views.
The Democratic Party doesn't believe in the things he believes in, free enterprise, respect of U.S. soldiers with better pay, etc.
Although the Republican Party is horrible, the Democratic Party is not any better. He'd be better off as a black Independent who still has conservative views.