Trumps attorneys are saying that if trump talks to Mueller he will incriminate himself and or commit perjury.
If as trump claims he is totally innocent and has nothing to hide how is it possible to commit perjury, you simply tell the truth!
In my mind what the attorneys are saying is that Trump is guilty and cannot tell the truth because it would incriminate him, his only option is to lie which would be perjury.
This admission of guilt by trumps attorney is astonishing in that guilt is no longer a question, it’s only a matter of how many crimes he has committed and how they will be proven!
If trump cannot tell the truth he should resign.
What other explanation makes sense?