True, but it is also a gamble. We do have the benefit of hindsight, and these people were lying through their teeth every step of the way, on top of gating information from us, and presumably anyone that might be a threat to them as well.

In addition, leaving that big of a void by firing them can have some...unexpected issues. And you just know that all of Trumps political enemies would blame any and every failure (potential or otherwise) that may arise from such an action upon Trump himself and those that support him