Democrat presidential candidate Julián Castro argued Thursday that President Donald Trump mocking teenage climate change activist Greta Thunberg’s TIME magazine “Person of the Year” cover makes it clear he is “unfit for office.” “The president of the United States is mocking a 16-year-old on Twitter,” Castro, who previously served as Secretary of Housing and Urban Development (HUD), wrote on Twitter in response to the president’s tweet. “It’s clear why one of them is the Person of the Year and the other is unfit for office.”
