Former CIA director John Brennan struck back at President Trump on Thursday, writing in a blistering op-ed that Trump’s claims of no collusion with Russia in the 2016 presidential election are “hogwash.” The piece, posted on the New York Times website, came a day after Trump announced he was stripping the security clearance of Brennan, who led the CIA during most of President Barack Obama’s second term and has emerged as one of Trump’s fiercest critics. In his op-ed, Brennan characterized Trump’s action as “politically motivated” and said it was “an attempt to scare into silence others who might dare...