Bernie Sanders is too radical and anti-establishment for the higher ranks of the Democratic Party. Joe Biden is too weak and a symbol of the old, “bland” politics of yesterday to many grassroot Democrats. Kamala Harris is too wishy-washy for both. That only leaves us with one candidate in the main top tier: Elizabeth Warren. She is firmly in the progressive camp, but is seen more electable than Sanders; and, with her very extensive policy proposals, has been able to show who she really is to the hyper-interested and involved voter in this year’s complex primary. She already appeals to the white, progressive, urban voters that Sanders was unable to win in the 2016 primary. While Sanders goes heavily on his rhetoric, Warren is able to talk about virtually everything with immense precision in terms of policy. I think that the higher ranks and the “corporate” Democrats find Warren a new type of progressive, one that doesn’t scare off normal voters who don’t want Bernie’s socialism-and one that can win those voters. She is not necessarily a “unify the two wings” type candidate like Harris is (which makes her seem not progressive or centrist enough on issues like healthcare and immigration), but a progressive that can appeal to the center-left part of the party.