voters. cnn's karen kuiper reports from manchester. >> reporter: the candidates biggest challenge on their final full day of campaigning here was the weather. snow and messy roadways. now donald trump and bernie sanders enter primary day with strong leads in the polls. there's a lot more to these two races than just the numbers. the new hampshire republican contest looks a lot different than iowa's last week, which was largely about the anti-establishment in a battle between trump and cruz. their closing arguments have taughted executive experience and the ability to mount a campaign that could beat hillary clinton in november if she is the nominee. they are hoping to hold off a surge. marco rubio started with a strong third place finish in iowa, especially after he faultered in saturday night's debate here. on the democratic side polls show a double diblg git lead for