How Mueller's path was muddied in two weeks

On December 1, all eyes in Washington were fixed on former national security adviser Michael Flynn pleading guilty to lying to the FBI. It was another sign that special counsel Robert Mueller's investigation into Russian meddling in the presidential election was gaining steam.

Nearly 24 hours later, top officials at the Justice Department had a problem.Media reports surfaced Saturday morning that two top FBI officials had traded a series of text messages trashing then-presidential candidate Donald Trump and supporting Hillary Clinton.Later that day, Mueller's office, in a rare move, was quick to issue a statement addressing the texts -- perhaps a recognition of the potential political upheaval brewing.Attorney General Jeff Sessions directed FBI Director Christopher...