Local Democrats have rescheduled a caucus to elect delegates to their party’s annual statewide convention. The caucus, postponed by last weekend’s blizzard, now will be held March 2 at 2 p.m. in the Brookline High School cafeteria. Residents who were registered Democrats as of Dec. 31 will be eligible to cast ballots for 41 delegates and six alternates for the convention, which will be held in Lowell on June 1. For more information, call Brookline Democratic Town Committee chairwoman Cindy Rowe at 617-277-6282.