Climate activist Greta Thunberg mocked US President Donald Trump using his own words from 2019 after he tweeted, "STOP THE COUNT". "Donald must work on his Anger Management problem...Chill Donald, Chill!" the Swedish 17-year-old tweeted. This was a reference to Trump's tweet in December 2019 with the same phrasing criticising TIME magazine's decision to name her 'Person of the Year'.