[Ed. – The pen-register record doesn’t require a warrant, and obtaining it is only a matter of case confidentiality, not national secrets. Apparently case confidentiality is off the table entirely now. At any rate, Rudy Giuliani responded to the first report by saying he doesn’t believe Cohen was “wiretapped,” which is what was basically implied by NBC’s first report. I assume Giuliani finds the pen-register record more credible. That’s pretty standard. Italics in original.]
[T]hree senior U.S. officials … now [say] that the monitoring of Cohen’s phones was limited to a log of calls, known as a pen register, not a wiretap where investigators can actually listen to calls.
Federal investigators have monitored the phone lines of Michael Cohen, the longtime personal lawyer for President Donald Trump who is under investigation for a payment he made to an adult film star who alleged she had an affair with Trump, according to multiple senior officials and individuals with knowledge of the legal proceedings involving Cohen.
It is not clear how long the monitoring of phone calls has been authorized, but NBC News has learned it was in place in the weeks leading up to the raids on Cohen’s offices, hotel room, and home in early April, according to one person with direct knowledge.