If and when the news comes tonight that a conservative Republican has won the special congressional election in a Brooklyn-Queens district with three times as many registered Democrats as Republicans, you’ll hear excuses pour forth from liberal blogs, commentators and political experts. Take the excuses seriously, because they’ll all have merit. Then reject them--because this surprisingly significant race has more to tell us about the election of 2012 than anyone could have expected even a month ago.(snip) But in this district, even a lousy Democratic candidate should be a gimme. The area has never gone Republican in a national race......Excuse No. 1: The Democrat, David Weprin, is a lousy candidate. He is. And the quality of a candidate matters.......Excuse No. 2: Israel played an outsized role....Excuse No. 3: Special elections don’t mean much nationwide