The surprise announcement by New Jersey First Lady Tammy Murphy that she is ending her U.S. Senate campaign should not slow down efforts to reform New Jersey ballot system that awards prime locations to candidates backed by county committees of both parties, a political observer says. Her opponent, U.S. Rep. Andy Kim, issued a statement, praising her a “voice for progress and public service in our state, and I respect her decision to carry on that work as First Lady.” KIm affirmed his position in a Sunday night call with reporters. to continue the federal lawsuit he and other candidates filed …