Term limits are very easy to get around. Look up how George Wallace and Vladimir Putin pulled it off. Basically you get some patsy/stand-in to run in your place. You run openly announcing that the stand-in will just be holding the pen. To keep them loyal, you select someone with no independent power or authority, low popularity, or no real interest in governing. Think someone like Jared Kushner. He's completely dependent on Trump financially and politically. They could run a President Kushner, openly admitting it's just going to be a third Trump term. Republicans could vote for Kushner reasonably confident that Kushner will remain loyal, as he has no independent existence from Trump.