Tomorrow marks one of the most important dates on the American political calendar. It’s Super Tuesday, when 15 states hold mini-elections to help determine who will win their party’s presidential nomination, and then go on to vie for the top spot in the White House, in November. 

So, which states are voting? And how might they tap into the personal and political vulnerabilities of the three main challengers: Donald Trump, Joe Biden and Nikki Haley?

Today, North America correspondent Farrah Tomazin on the rage, disillusionment and hope she’s been seeing as she travels from state to state. And who might come out a winner tomorrow.