Youth politics came to a New Haven high school Monday — and students saw up close how running for office can make a difference. The occasion was a visit by two 23-year-old legislators Westport State Sen. Will Haskell and Hamden Councilman Justin Farmer —to juniors at Metropolitan Business Academy on Water Street. Civics teacher Julia Miller — who has the phone numbers of U.S. Rep. Rosa DeLauro and U.S. Senators Richard Blumenthal and Chris Murphy printed large on her classroo