These Are the Voters Who Are the Biggest Wildcard in the New Hampshire Primary (Video)
It's game on in the battle for New Hampshire, a small state that hosts the nation's first, and perhaps most significant presidential primary.
Of New Hampshire's 874,000 voters, nearly half are undeclared, meaning they can cast a ballot in either party's primary, according to both parties' rules. In recent elections, 40 percent of voters made up their minds within three days of the primary. So the race can be hard to predict.
Donald Trump and Bernie Sanders currently have double-digit leads in the polls. And New Hampshire is known for narrowing the field—something to look for Tuesday night.