This appears to be the basis for Trump's claims.
https://www.washingtonpost.com/worl...8c6b94-027c-11e7-9d14-9724d48f5666_story.html
In that story we read about a report for a FISA warrant but not for a wiretap.
Here's her take:
https://heatst.com/world/exclusive-fbi-granted-fisa-warrant-covering-trump-camps-ties-to-russia/
According to that article the FBI (not Obama) became aware of a Trump Tower server directly connected to Alfa, a Russian bank. Note this isn't automatically a connection to Putin, however it was of sufficient concern that communications were monitored.
Take home to those who won't read, a report concerning monitoring of a Russian connected server in Trump Tower caused the issue of a FISA warrant for the purposes of monitoring data.
This was not a "wiretap" in any sense, it was financial movements which were monitored not verbal communications between Trump or his representatives, and this was per the FBI which wasn't in the job of protecting Hillary during this timeframe.
If this is correct we now have a basis behind the false accusation. I'm sure of course that Trump will come up with more than this report and nail that bastard Obama, right?
Gets better and better.