While Biden’s campaign pulled negative ads, super PACs kept attacking Trump

Democratic nominee Joe Biden pulled negative ads after President Donald Trump tested positive for COVID-19. But deep-pocketed super PACs supporting Biden’s campaign continue to hammer Trump on the airwaves, showing how outside groups often do the dirty work for candidates.

Shortly after Trump announced he had contracted COVID-19, Biden said he would cancel attack ads against Trump. Biden and his campaign leaders also asked staff to refrain from commenting about Trump’s condition on social media. In a new video, Biden told voters “This cannot be a partisan moment, it...