Just one day after Michael Flynn pleaded guilty to lying to the F.B.I. in the Russia investigation, reports have surfaced accusing a veteran investigator in the special probe of sending disparaging text messages regarding President Donald Trump. The investigator was removed from the probe a few months ago because of the potential of a political bias. The New York Times and The Washington Post both reported December 2 that Peter Strzok, a senior counterintelligence investigator at the F.B.I., was removed from the probe because several disparaging text messages indicated he wasn’t a fan of Trump and was possibly a Hillary...