The foreign target being monitored by our intelligence service was the Russians. An American (Flynn) phoned the foreign target, and so his several conversations with them was captured. The American was committing treason against the US government.
Trump then claimed this vindicated his bogus claim that Obama had wiretapped Trump Tower, and the fucking tard Chumps bought it.
In his testimony, Comey makes clear several times that Trump's tweet about Obama wiretapping Trump Tower was completely bogus.
When members of the Obama Administration leaked those private conversations to the media they were breaking the law. It's illegal to wire tap one individual via a court order without protecting the privacy of other individuals not included in the court order. Obama's people used our intelligence services against their political opponent. That's not some vague allegation made by anonymous sources...that actually happened!
You need to read the testimony to which I linked.
It is not illegal to wiretap the Russians and record the calls of people who call them if you have a FISA warrant, which they did. That's how Flynn got caught in the net.
Comey also goes into great detail how a U.S. person can be unmasked. There is a protocol for doing that is the U.S. person who contacted the foreign target is engaged in criminal activity with the foreign target, which it appears Flynn was.
Someone leaked to the press about Flynn's treason. The leaker did break the law by doing that, but why are the tards more angry at the leaker who revealed the treason than they are at the traitor?
Because they are partisan hacks.
It's Okay If Trump Does It!™