Edit: rather than a new post I accidentally edited out my original. Very clever.
There is likely as much evidence that Obama personally ordered an illegal wiretap, bypassing FISA court and controls, as there was for Trump's other favourite Obama conspiracy, that he is a Secret Kenyan Muslim. Or that Ted Cruz's dad was in on the Kennedy assassination. Or that there were 3-5 million fraudulent votes in the election, just enough to give Trump a win in the popular vote.
The FBI being granted a warrant in the FISA court, after showing probable cause, to tap the likes of Page, Stone, Flynn, Manafort et al and the WH being informed of an active national security investigation in due course is different. Obama would know, but it would be neither illegal nor improper. Spoken with a truly shallow understanding of the US.
Day 44, and 45 raises the stakes by going after 44.