manu ragu on the hill breaking news. i want to play audiotape that you obtains of a senior sanders aide encouraging supporter tos, quote, take over the convention. take a listen. >> you should not leave. i'm going to repeat that. unless you are told by somebody from the campaign, i.e. probably me or david, that you can leave, you should not leave. >> what more are you hearing from democrats? what happened here? >> reporter: well, democrats are very nervous, jake, that this could spill out into the philadelphia convention. they believe that sanders supporters, probably a group, small number, say a large majority of sanders supporters are peaceful but a small number of them are loud, restless, heckle surrogates of the clinton campaign. it's something they are worried can spill over into philadelphia. what the sanders campaign says is that, look, the sanders campaign throughout the process, throughout number of states, including in nevada, those folks have been shut out of the process, rules have been stacked against them,