Some political historians believe the roots of our presidential nomination process and much of the polarization in our politics can be traced to a presidential campaign 50 years ago.In 1972, Democratic Sen. George McGovern made a run for the presidency. Despite having little experience on Capitol Hill, McGovern secured the Democratic nomination.The podcast "Of the People" takes a deeper look inside the 1972 Presidential campaign. It examines how party realignment and the changes to our primary system continue to impact our politics today.Want to support 1A? Give to your local public radio station and subscribe to this podcast. Have questions? Find us on Twitter @1A.