Surprises abound. The most striking - Sen. Marco Rubio's stellar showing in the first electoral contest of the 2016 presidential cycle. He drastically beat expectations, raking in 23.1%. According to Sen. Bernie Sanders, the Democratic contest was a "virtual tie." Hillary Clinton didn't agree.

Figures from a Bloomberg/Des Moines Register survey have Donald Trump and Hillary Clinton holding small leads. The big question is: With a possible snowstorm in the mix tonight, who will turn out to vote?