Gregg Popovich, head coach of the San Antonio Spurs, has once again used an NBA press conference as a platform to attack Donald Trump with a 15-minute tirade delivered ahead of Saturday’s game. Popovich kicked off his attack by calling Trump “pathetic,” Fox News reported. Gregg Popovich, head coach of the San Antonio Spurs, has once again used an NBA press conference as a platform to attack Donald Trump with a 15-minute tirade delivered ahead of Saturday’s game. Popovich kicked off his attack by calling Trump “pathetic,” Fox News reported.