What did Donald Trump do today?

He got a little confused about Pittsburgh.

In announcing today that he was withdrawing the United States from the Paris Climate Accords, Trump justified the move by saying that he "was elected to represent the citizens of Pittsburgh, not Paris."

It's not clear if New Yorker Trump has ever been to Pittsburgh, give or take a few campaign rallies, but the stereotype of Pittsburgh as a gritty coal-and-steel town has been out of date for at least 40 years. The major industries in the city now are software, biotechnology, education, and health care. The city's legendary coal smog--which was sometimes spectacularly fatal--is now completely unknown, and the Alleghenies are dotted with wind turbines.

As for Trump's claim to representation, Hillary Clinton soundly defeated Trump in Allegheny County, winning 56.4% to 40.0%, and got about 78% of the vote in the city itself. Reaction to Trump's mention of the city in a speech that glorified coal was not met kindly by Pittsburghers. 

Why should I care about this?

• Presidents shouldn't claim support they don't have, whether in one city or the whole nation.