The dossier itself and whatever was learned from the surveillance formed the basis for commencing the investigation of the Trump campaign's alleged ties to Russia by the Obama Department of Justice, which is now being run by special counsel Robert Mueller and has been expanded into other areas. The surveillance of the Trump campaign based on arguably flimsy evidence put McCabe into President Trump's crosshairs. Indeed, Trump attacked McCabe many times on social media and even rejoiced when Attorney General Jeff Sessions fired him at 10 p.m. last Friday, just 26 hours before his retirement was to have begun.