538 proposed re-ordering the democratic Presidential primary calendar since Iowa and NH are extremely white states which don’t really reflect the Democratic coalition. The problem is that the top four states, Ill, NJ, NY and Fl, are all big states that are expensive to run in, so they don’t offer the opportunity to engage in retail politicking to give a candidate the opportunity to show their appeal without already having a lot of money. So I would suggest that the season kick off with two smaller states that are diverse: Nevada (because almost everyone in Nv lives in Vegas) and Delaware.