Pittsburgh Mayor Bill Peduto says Donald Trump is a bully after the president tweeted about teen activist Greta Thunberg. Mayor Peduto recently returned from Madrid at the UN’s latest climate change conference. Teenage climate activist Greta Thunberg was with the mayor at the conference when she was named Time Magazine’s “Person of the Year.” President Trump tweeted Thursday about Greta’s designation.“So ridiculous,” Trump tweeted. “Greta must work on her Anger Management problem, then go to a good old fashioned movie with a friend! Chill Greta, Chill!” Peduto responded, “The president has chosen, even before he was the president, to use his bully pulpit as a bully”. Social media erupted.