4 governor's races to watch on election night

There are 11 gubernatorial races down for decision on Election Day, with four being competitive, according to the Fox News Power Rankings.

This year, up to 150 million Americans are expected to cast ballots in the U.S. presidential election, while levers will also be pulled for gubernatorial races and other down-ballot races.

New Hampshire is the most difficult governor's race to call and is considered a toss-up, as former Republican Sen. Kelly Ayotte takes on Democrat Joyce Craig...