By Sam Wang and David Daley Fans of a free political market in New Jersey may be feeling an unfamiliar sensation: hope. Not just because of the heat of national politics, but because of shifting political ground in the Garden State. A bill authored by state Senator Andrew Zwicker can build on that hope by giving democracy here a fresh start. Cracks are showing in the party boss-dominated Jersey political machine. First, the infamous “county line” is on its way out. Without it, insider candidates will no longer have the advantage of ballots designed to give them an insurmountable boost. Removal…