They’re not doing this to try to get Cohen, they don’t have enough to show he committed a crime. The purpose of this is to charge him to embarrass Trump on Stormy Daniels. And they seized things beyond the scope as well.
Via WaPo:
Michael Cohen, the longtime attorney of President Trump, is under federal investigation for possible bank fraud, wire fraud and campaign finance violations, according to a person with knowledge of the case.
FBI agents on Monday raided Cohen’s Manhattan office, home and hotel room as part of the investigation, seizing records about Cohen’s clients and personal finances. Among the records seized were those related to a 2016 payment Cohen made to adult-film star Stormy Daniels, who claims to have had a sexual encounter with Trump, according to another person familiar with the investigators’ work.
Investigators took Cohen’s computer, phone and personal financial records as part of the search of his office at Rockefeller Center, the second person said.
The broad seizure collected communications between Cohen and his clients — including some with Trump, according to both people.
The raid was related to an investigation referred by special counsel Robert S. Mueller III to federal prosecutors in New York, said Stephen Ryan, an attorney for Cohen.