Can American Public say so to President Trump?
At this point, we are looking at the first serious challenge to Trump Presidency. It all boils down to few specific things:
- Saying "I hope you can let this go,"  was it just the manner of speaking or a command or an implicit threat?
- Knowing Trump, the chances are that he would have asked Comey and others many times on this matter. If it turns out to be a threat - entirely possible with Trump - then 'obstruction of justice' charge sticks to President Trump, which is enough to get impeached.
The problem for Donald Trump is, how do you discredit James Comey by providing any other alternative explanation? Trump believes in his reckless aggression so much that probably he never bothered to think through how Comey can boomerang on him.
The 'tapes' with which Trump threatened Comey may, on the contrary, contain accounts to bolster Comey's case than Trump's. Sure, one can imagine 'foolishness of Trump' where he is trying to threaten someone which actually undermines himself. Chances are that, if those tapes exist and I think so, those tapes would rather undercut President Trump.
There are still too many unknowns, and the case for Donald Trump Impeachment has not cooked yet. But what we do see is a possibility of such "baking" to start for sure. If it develops along those lines, there will be a point when GOP House Representatives and Senators would find it politically indefensible - for their own political future - to stand by Donald Trump. When Nixon realized that Republican House Members would not stand for him, he resigned. That is the dynamics here.
As James Comey's public testimony in Congress develops as well as his memos make roads through Congress; we are bound to learn more. Yes, there can be a possibility that Trump is exonerated as more information comes; but knowing how unprepared Donald Trump is to the presidency, knowing that Trump himself is famous 'political destructor' of himself; odds are we are looking at a perilous presidency here.
 New York Times reports that is what then FBI director James Comey wrote in his memos after meeting President Donald Trump. Other Media outlets are confirming it independently.
 After all the staunch Conservative like Mike Pence as the President, after Trump is impeached, is a very much 'viable vessel' for Ryan's of the world for their agenda.