President Biden urged the nation to unite in a rare Oval Office address on Sunday night – a day after a gunman tried to assassinate former President Donald Trump at a Pennsylvania campaign rally. “My fellow Americans, I want to speak to you tonight about the need for us to lower the temperature in our politics and to remember that while we may disagree, we are not enemies, we are neighbors, we are friends, coworkers, citizens, and most importantly we are fellow Americans,” the 81-year-old president said. “Yesterday’s shooting at Donald Trump’s rally in Pennsylvania calls on all of us...