nwsun, your idea Trump should fire Mueller is bad advice. It would be a terrible move for Trump, just as firing Comey turned out to be.
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And you shouldn't need a lawyer to lay that out for you.
You haven't mentioned money laundering which has virtually been a certainty for decades. That's my favorite, as conspiracy is a much more difficult crime to prove.
The rule of law is crucial to a solid democracy. That's why Mueller is into it, and Trump isn't.