The offer reportedly holds that Trump would agree to be interviewed by Mueller in exchange for (1) a sixty-day deadline to end the probe and (2) that the only issues discussed would be the firing of former FBI Director James Comey and the firing of National Security Adviser Michael Flynn.
This, of course, is laughable. Trump's lawyers have no leverage to make these demands. A possible suspect can't limit the length of an investigation nor what it will entrail. As both the investigations into Richard Nixon and Bill Clinton have already established, thanks to rulings from the Supreme Court, Mueller can simply subpoeana Trump and question him about anything he wants.
The piece quotes a former federal prosecutor and an expert in government investigations who said: "you can’t put a timeline on these things. Someone could walk in the door on the day before their proposed deadline and say, 'I’ve got some information that’s going to blow your minds.' Mueller’s going to say, 'Oh, too bad, the deadline’s tomorrow?'"