Today is primary election day in Minnesota and more than a dozen other Super Tuesday states. Plus, around 4,000 janitors are starting the second day of a three-day strike over pay and retirement benefits.This is an MPR News morning update, hosted by Alex Simpson. Music by Gary Meister.Find more from these stories at MPRnews.org.It’s Super Tuesday: What to know about Minnesota’s presidential primary electionThousands of Twin Cities janitors begin three-day strikeRead the latest edition of the AM Update newsletter.Subscribe on Apple Podcasts, Google Podcasts, Spotify, YouTube or RSS.