Day of bombshells takes Mueller probe to critical point

A stunning barrage of revelations on Tuesday suggested that at least one strand of Mueller's Russia probe is racing toward its end game, emphasizing the gravity of the situation facing the White House and the potential vulnerability of the President.
Mueller's request to question Trump, and news that his team has already interviewed fired FBI Director James Comey and Attorney General Jeff Sessions, indicate that the special counsel has a clear picture of where he is headed in what could turn into an obstruction of justice case, legal experts said.
"It's possible that Mueller is closing in on his determination about what obstruction looks like, whether it is a criminal offense in his mind, whether it is an impeachable offense, or whether it amounts to nothing," Michael Zeldin, a former senior aide to Mueller at the Justice Department, told CNN's Brooke Baldwin.
Tuesday's bombshells came amid new signs that Trump is still pushing up against constitutional norms in his conduct toward judicial authorities usually seen as independent of the President.
The current FBI Director Christopher Wray threatened to quit, a source familiar with the situation told CNN, after coming under pressure from Sessions, to clean out senior leadership figures dating from the Comey era who the President believes are biased against him. The development was first reported by Axios.