Missouri's 2018 primary is tomorrow. Here's what you should know.

On the surface, the purpose of Tuesday’s primary is only to select candidates that will run in the November general election. But in reality, the results could resonate for years to come.

That’s because Missouri voters will decide whether to retain right to work, which bars unions and employers from requiring workers to pay dues as a condition of employment. And in the St. Louis region, prevailing in the Democratic primary is often tantamount to election — especially in state legislative and local contests.

So on this episode, Jo Mannies and Jason Rosenbaum break down what to look for on Tuesday. And they're joined by a mystery guest to explain some vital information about going to the polls.