which is code for ... we will not defend you if you do that.
If Trump did nothing wrong he has nothing to fear from Mueller. But his behaviour seems to imply he has things to fear.
Even csl seemed to suggest he suspects criminality by invoking the setting aside of the fifth amendment amongst his concerns. But Trump and his attorney created their own problems by the way they set up or purport to have set up their NDAs.
Someone should tell Trump that if you are innocent, act like it.
Oh. Someone did that already. And he ignored them.