Trump's lawyers reportedly want him to refuse an interview with special counsel Robert Mueller
Needless to say. They graduated from law school, so they can't be complete morons.
(1) They know that Mueller is going to ask questions that he already knows the answer to, in order to test whether Trump will perjure himself.
(2) Trump has serious legal problems with the Comey firing (he basically confessed to obstruction in his Holt interview and his meeting with the Russians), as well as with his participation in the cover-up of the Trump Tower meeting (several people have told the press that Trump personally made the decision to lie publicly about the purpose of the meeting). And those are just the things Mueller can prove beyond doubt. There's also Comey's contention that Trump asked him to drop the Flynn investigation, which is supported by memos and conversations Comey had in the aftermath. That still just comes down to Comey's word against Trump's, but ... can Trump be trusted to navigate that under oath?
(3) Therefore, given Trump's nature, he probably will perjure himself.
So, yeah, any lawyer should advise him to refuse. I don't think Mueller, a very prudent man by all accounts, will risk either a constitutional crisis or the possibility of having a subpoena quashed by the Supreme Court, so a Trump refusal will probably mean that he'll never have to discuss the matter under oath.
But at least a minor crisis will ensue nonetheless.
Trump's lawyers can't tell Trump the truth about why they don't want him to testify. ("You're the guy who claimed the largest inauguration crowds and the most-watched SOTU address. We don't think you can go two sentences without lying.") Therefore they will have to give him a bullshit reason for refusing, and that reason, because it will be obviously disingenuous, will just end up reverberating through the media cycles when Trump proclaims it, probably through Twitter.
What public reason will they give? They've already floated "Mueller doesn't have sufficient stature," but I don't think they'll go with that one. Will it be the tried-and-true "witch hunt"? Stay tuned.