ABC News -- ABC News Rick Klein reports: In the push-pull between Democrats and Republicans, it's a day for none of the above. On an Election Day that will provide limited data -- and that the GOP looks likely to celebrate, while Democrats tell us to look elsewhere -- there's a surfeit of evidence that independents are the powerbrokers of American politics. A third-party candidate may win a congressional seat in upstate New York. Another might swing a governor's race in New Jersey. Virginia appears poised to elect a Republican governor who's reached for the same middle President Obama counted on last year. And in New York City, a Democrat-turned-Republican-turned-independent stands to win an unprecedented third term, mostly by being a good mayor (and...