Gunfire erupted at a Donald Trump rally on Saturday, sparking panic in the crowd and spattering the Republican presidential candidate with blood, before he emerged and defiantly pumped his fist in the air and was ushered to a waiting car. Trump grimaced and grabbed his ear before security hustled him away, his red "Make America Great Again" hat knocked off. The Secret Service and the former president's campaign said Trump was safe following the shooting in Butler, Pennsylvania, about 30 miles (50 km) north of Pittsburgh. Live video showed blood spattered on Trump's right cheek and ear. Downing Street in...