After 130 days spent fighting the federal government, Elon Musk turned up with a black eye at the White House on Friday for his last day as a “special government employee.” If you squinted, you could see it: His right eye socket was puffy and empurpled. No doubt about it, that was a big, fat shiner.

The Tesla CEO's quick reversal after his blow-up with the president communicates quite a lot, one expert in political science says.