New Yorkers Against Gun Violence has endorsed Senator Kirsten Gillibrand and Perry Gershon. The New York League of Conservation Voters has endorsed Perry Gershon for Congress. The East Hampton Democratic Committee and the Friends of David Lys will hold a campaign rally tomorrow from 6 to 8 p.m. at the American Legion Hall in Amagansett. The Clubhouse at East Hampton Indoor Tennis will host an Election Day party, which the facility’s proprietor, Scott Rubenstein, called a bipartisan effort to encourage people to exercise their right to vote.