Donald Trump has defied the laws of political gravity for months, surviving despite eschewing advice from campaign professionals. The result will test a lot of what we thought we knew about how campaigns must be run.

Even if Trump has a stronger than expected showing or outright victory, most politicians will be unable to replicate what he has done. Trump could flout political norms because he is rich and famous. I’ve argued other wealthy celebrities could follow his example. If they don’t, it would probably be folly for a conventional politician to try.