What happens if Supreme Court extends Donald Trump's immunity bid beyond US Presidential polls?

The US Supreme Court suggested it might drag out Donald Trump’s claim of immunity from prosecution, an outcome that could doom any chance of a pre-election trial on charges of trying to stay in power illegally.

source https://www.livemint.com/news/world/what-happens-if-supreme-court-extends-donald-trumps-immunity-bid-beyond-us-presidential-polls-11714148554014.html