So, what happened at Trump Tower?

This is what I get so far. Obama's henchmen went to the FISA Court in June to place a tap in Trump Tower. The request was denied. Then another request was launched in October or November. The reason? Somebody had an account with a Russian bank and to the Obama henchmen this was suspicious. So, the FISA Court granted the tap. It turned out that the whole thing was quite innocuous.

Questions:

1. Was the suspicion reasonable or just an excuse to tap the campaign?
2. Did this connection give the idea to the Obama henchmen to launch a campaign to delegitimize the Trump election?
3. Was Hillary told and how? (There was a tweet from her indicating she was told). That is a felony.
4. Did Obama know and when?

Charles Schumer invokes the "Law of the Suspect." This was used during the French Revolution. It made it illegal to be a suspect. Schumer claims that if there was a tap (and a probable cause) that this is especially bad for Trump.