For the first time in the post-World War II era, cities are growing at about the same rate as their suburbs, which for decades grew at a much faster clip. That’s good news for Democrats (especially Hillary Clinton) nationally: Their party’s recent Electoral College victories have been fueled by huge vote margins in urban cores.
But presidential success may come at the expense of Democratic candidates at the congressional and state legislative levels: The increased clustering of Democratic votes in central cities has diminished the party’s fortunes in the large swath of suburban and rural seats that are crucial to building legislative majorities. CONT.
David Wasserman, FiveThirtyEight