US Republicans score big in off-year electionsAFP November 4, 2009, 1:06 pm NEW YORK (AFP) - US Republicans won two governors' seats in off-year elections that dealt a stinging blow to President Barack Obama and his Democrats exactly 12 months after they swept into power. In New Jersey, Republican Chris Christie pulled off an upset to defeat Jon Corzine, the incumbent governor in the heavily Democratic state, by a margin of 55-44, according to preliminary results. And in the first Republican victory of the night in Virginia, Bob McDonnell took back the governor's mansion from the Democrats by defeating Creigh...