Arlen Specter - Switch In Time Nets Fifty-Nine (Senate Seats)

In case you were wondering about the legal and/or constitutional implications of a party switch by an imcumbent, I recommend James S. Wrona & L. Francis Cissna, "Switching Sides: Is Party Affiliation a Tie that Binds?, 28 Ariz. St. L.J. 735 (1996).   The article does a good job of outlining the possible issues that could be raised by constituents, and well as the Constitutional arguments a Represenative or Senator might offer in defense of such arguments.  

NLS