**File Photo** The daughter of former U.S. president BILL CLINTON and current Secretary of State HILLARY CLINTON is engaged. CHELSEA CLINTON is set to marry her longtime boyfriend Marc Mezvinsky next summer (10) after accepting his proposal on Thanksgiving ...

In this Dec. 1996 file photo, Chelsea Clinton, right, sits with Marc Mezvinsky on the beach at Hilton Head Island, S.C. (AP Photo/Mary Ann Chastain, File)