Agents overseen by the US Attorney's office in Manhattan, and acting in part on a referral from special counsel Robert Mueller, were seizing records on subjects that include a $130,000 (£92,000) payment to Stormy Daniels, who claims she was paid to keep quiet about an affair with Trump.
Cohen admitted to making the payment just before the 2016 US election, but argued the payment was lawful and was not funded by the Trump organisation or the campaign.
People - in particular, social media users - never forget.
The internet was quick to ensure the tweet came back to haunt Cohen.
Well this is now awkward AF. https://t.co/wJzvtY8PuY