Will Donald Trump sweep the South? Can Hillary Clinton wrap up the democratic race tonight? Will Bernie Sanders win any states besides his home state of Vermont? Will Marco Rubio win anything?
These are among the many questions that will be answered before the Tuesday night is over.
Alabama, Arkansas, Georgia, Massachusetts, Minnesota, Oklahoma, Tennessee, Texas, Vermont and Virginia are holding contests for both Republicans and Democrats. Additionally, Republicans in Alaska and Democrats are caucusing.
So, who is winning? Refresh this page for continuous updates as results come in.
Super Tuesday: Watch 9 Key YouTube Clips for Trump, Clinton, Sanders and Cruz (Video)
The "Official Donald Trump Jam" spawned a viral hit you can't out of your head -- whether you like it or not. This clip of the "Freedom Girls" performance has more than 5 million views.
Hillary Clinton's official video announcing herself as a candidate for the first time has been watched 4.8 million times.
A tear-jerker montage of American families and workers is the Bernie Sanders campaign's most viewed clip, with 3.2 million views.
When Time picked Trump as its Person of the Year, they posed him with a bald eagle that rearranged Donald's "do" and staked a claim on his aspirin.
Without the name recognition of Clinton or Trump, one of Sanders most popular videos summarizes who he is him and why he's running in two minutes.
Ted Cruz took advantage of the holiday spirit to post a satirical story-time skit that has netted his official YouTube page 1.9 million views.
Get comfortable -- a 51-minute video officially launching Trump's campaign has been watched more than 1.8 million times. (How many people viewed the whole thing is something only YouTube parent Google knows.)
HBO talk host Bill Maher grilled Sanders on what socialism really means
Clinton joined Ellen DeGeneres in New York to talk about sexism, Kanye running for president and her granddaughter's first words.
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On the biggest day in the primary season, catch up on candidates' key moments, including an eagle messing up Donald Trump's hair and Hillary Clinton bonding with Ellen DeGeneres
The "Official Donald Trump Jam" spawned a viral hit you can't out of your head -- whether you like it or not. This clip of the "Freedom Girls" performance has more than 5 million views.
