Sounds like this is where it all got started. Wiretapping everyone for politics. Then they learned they could wire tap Americans when they were wiretapping Israel over opposition to the Iran deal, because Americans talked to people in Israel about the deal.
“Barack Obama ‘approved tapping Angela Merkel’s phone 3 years ago’
President Barack Obama was told about monitoring of German Chancellor in 2010 and allowed it to continue, says German newspaper”