Gavin Newsom is having a moment. In the national struggle over U.S. House control, perhaps no politician has more at stake than the California governor, who has emerged as the leading Democratic adversary to President Donald Trump in what many see as a lightly masked trial run for his own future White House bid.

The California governor has poked fun at the president's social media posts in recent weeks, having his press office copy Trump's use of all capital letters in their posts and giving Republicans and right wing figures denigrating nicknames.