Jon Cardin

Last August, Maryland state delegate Jon Cardin (D-Baltimore County), nephew of the state's junior U.S. Senator Benjamin Cardin (D), proposed marriage to his girlfriend. But unlike normal folks who might propose via the jumbotron at the ball park or by having a waiter slip the diamond ring in a champagne flute, Del. Cardin decided to get the local cops to help arrest his woman's heart -- by…