Democratic Sen. Amy Klobuchar of Minnesota announced she is running for president in 2020 during a speech at a rally along the Mississippi River on Sunday. She joins a record number of women in the most diverse Democratic primary field in U.S. history.Subscribe to the CBS News Channel HERE: http://youtube.com/cbsnewsWatch CBSN live HERE: http://cbsn.ws/1PlLpZ7Follow CBS News on Instagram HERE: https://www.instagram.com/cbsnews/Like CBS News on Facebook HERE: http://facebook.com/cbsnewsFollow CBS News on Twitter HERE: http://twitter.com/cbsnewsGet the latest news and best in original reporting from CBS News delivered to your inbox. Subscribe to newsletters HERE: http://cbsn.ws/1RqHw7TGet your news on the go! Download CBS News mobile apps HERE: http://cbsn.ws/1Xb1WC8Get new episodes of shows you love across devices the next day, stream CBSN and local news live, and watch full seasons of CBS fan favorites like Star Trek Discovery anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B---CBSN is the first digital streaming news network that will allow Internet-connected consumers to watch live, anchored news coverage on their connected TV and other devices. At launch, the network is available 24/7 and makes all of the resources of CBS News available directly on digital platforms with live, anchored coverage 15 hours each weekday. CBSN. Always On.