President Trump has indicated a willingness to be interviewed "on the record" by the Mueller special prosecutorial team. Many have counseled him this is a bad idea, that he should instead refuse.
Power Line regular Paul Mirengoff marshals the legal arguments against Trump testifying. If the issue interests you at all, the Mirengoff column is worth your time.
On the other hand, as Dilbert creator Scott Adams has noted, Trump is perhaps the most accomplished communicator of this era. If Trump believes he absolutely must speak with Mueller's people to retain his own public credibility, he is very likely correct in that assessment.