Former President Barack Obama reportedly told a visitor that President Donald Trump “knows absolutely nothing” after the two met at the White House in 2016. Obama and his small staff had to deal with “a crazy president personally obsessed with Obama” after Trump won in 2016, Politico reported Tuesday. The former president has gradually become more vocal against Trump since the election, but appears to have privately voiced concerns throughout Trump’s tenure. “He [Trump] knows absolutely nothing,” Obama reportedly said after one White House meeting. Obama “held out hope” for a traditional relationship as past and current president, Obama’s first...