Why it matters: Look for 2020 Democratic candidates to be more careful than ever not to offend anyone, while Trump revels in the contrast with a stream of outlandish assertions and observations that will delight his followers.

On one side, you have President Trump, easily the most politically incorrect figure to win the White House in the modern era. He loves nothing more than to taunt liberals, the media and America with throwback thinking and insults.

On the other, you have the most diverse Democratic field ever, showing early and enthusiastic insistence on inclusivity, as well as race, gender and lifestyle sensitivity.