Andrew Rice stood outside Hamden’s Miller Memorial Library Monday evening as he made an “11th hour” push to garner roughly 1,000 more signatures from local Democrats in order to force U.S. Rep. Rosa DeLauro to face a primary election. Along the way, he received encouragement from some prospective voters to keep running in November — even if he doesn’t make the Democratic primary ballot. Rice, a 37-year-old democratic socialist from Milford, is r…