Bernie Sanders said the Democratic primary process is a "rigged system" at a campaign event in Evansville, Indiana on Monday. Sanders announced last night at the National Press Club that the Democratic convention will be a contested one.



"When we talk about a rigged system, it's also important to understand how the Democratic Convention works," Sanders said Morning morning. "We have won, at this point, 45 percent of pledged delegates, but we have only earned 7 percent of superdelegates."



Watch Sanders' full rally in Evansville today:







Sanders speaks at the National Press Club, announcing his contested convention strategy:



