disruptions if we move from the current system, where about 175 million people are covered by the private sector insurance, to something where everything is covered by the government. we probably wouldn't have enough doctors. there would be people who would find gaps in their coverage and things like that it's remarkably complex to get there. it would be very disruptive. as voters learn more about this. they're saying -- no thanks. >> as you're putting forth this cogent analysis. that's for the future. this is out there on the campaign trail. and the staple of some candidates notably bernie sanders and elizabeth warren, they're the ones continuing to push this prospect. elizabeth warren is the one who has gotten the most criticism or analysis hurled at her, despite bernie sanders being the one as you quote him saying who wrote the damn bill, why is that? >> well bernie is all in on medicare for all. he was talking about this in 2016. nothing has changed there. elizabeth warren, used to say i'm with bernie, i back medicare