This is why you appoint a special prosecutor to conduct an investigation. To grossly simplify: either the leakers are dangerous to democracy, or they're patriots blowing the whistle on serious misconduct. If we find that Flynn lied to the FBI and that he acted inappropriately with regard to sanctions, then the leaks certainly feel like an act of a whistleblower.

If there's nothing to the allegations, an investigation would vindicate the administration.

The fact that everyone is stalling on an investigation just raises questions.