Somewhere around 5,000 state legislators and legislative staffers from around the United States have gathered in Minneapolis this week to talk policy and politics. 

The National Conference of State Legislatures kicked off its 40th annual "Legislative Summit" on Tuesday at the Minneapolis Convention Center. It's by far the largest nationwide organization representing state lawmakers from all 50 states. 

A number of prominent Minnesota legislators from both parties are hosting events and participating in discussions at the four-day meeting, including state Senate president Sandy Pappas, House Speaker Paul Thissen and Senate Majority Leader Tom Bakk. Gov. Mark Dayton is scheduled to offer welcoming remarks at a general assembly meeting on Wednesday morning. 

Hundreds of sessions will cover a wide range of policy concerns and political issues. U.S. Sen. Amy Klobuchar of Minnesota is scheduled to join Cindy McCain, wife of U.S. Sen. John McCain, to discuss an initiative they're leading to reduce human trafficking in the U.S.

Other speakers include retired Gen. Wesley Clark, cellist Yo-Yo Ma, and national political journalists Mark Halperin and John Heilemann, co-authors of the bestselling books "Game Change" and "Double Down."