Former right-wing operative Matthew Sheffield opened up in a lengthy piece for Vanity Fair about how he got mixed up in the relationship between former President Donald Trump and former National Enquirer chief David Pecker, in their “catch and kill” scheme to protect him from damaging information ahead of the 2016 election. The Enquirer scheme is not directly charged in the Manhattan hush money trial — but District Attorney Alvin Bragg is using it to establish a pattern of behavior to prove the charges of business fraud stemming from his alleged payment to adult film star Stormy Daniels to con…