(Reuters) - Canada's main stock index looked set to open lower on Wednesday, as focus shifted from Barack Obama's presidential win to the "fiscal cliff" that might derail the world's largest economy. TOP STORIES Emboldened by a resounding election victory, President Barack Obama immediately pledged to reach across America's political divide and seek deals on stubborn issues that dogged his first term. Greece's ruling coalition hopes to overcome its own divisions and defy protesters to push through an austerity package needed to secure aid and avert bankruptcy. ...