The Supreme Court's widely derided ruling last week on presidential immunity opens up an extreme possibility — imagine a kiosk in the lobby of the White House where the president's "lap dogs" order get-out-of-jail free cards rather than fries and a soda.That's the country's new reality, according ...
Who’s going to prosecute him? He can just imprison or fire anyone who tries.
This is presumably in reference to a past president, who would not have those powers. The legal issues surrounding prosecuting a sitting president have not been explored, and this ruling does not address them directly as they were not relevant to the case.
But Trump won’t be a past president because he won’t leave office until he’s dead. He’ll never be prosecuted, and he knows it.
The risk of something like that happening is not closely connected to anything in the ruling we’re discussing here. If a president manages to hold on to power after losing an election or reaching a term limit, the situation has devolved far beyond ordinary criminal prosecution; the constitution is no longer being enforced at that point.
This ruling is what gives him the immunity to prevent enforcement of the constitution.