The Democratic Party’s long term problem is worse than you think

The Washington Post's Greg Sargent has worries:

Today I chatted with David Wasserman, who closely tracks House districts for the Cook Political Report. Wasserman recently wrote that due to population shifts and redistricting that have resulted in huge concentrations of Democratic votes in Dem districts — wasting a lot of those votes — Democrats can now expect that the percentage of seats they win will consistently trail their victory in the overall popular vote by about four percentage points.

Can regaining ground on the state level help change this? At my request, Wasserman went a bit deeper into the numbers.

The starting point for changing it, Wasserman notes, would be in the big swing states that President Obama carried in 2012. Even though Obama won them, Dems still hold far fewer legislative and Congressional seats than Republicans do. In Ohio, the breakdown of seats in the next Congress will be 12 Republican, four Democratic. In Pennsylvania the breakdown will be 13 Republican, five Democratic. Those two states, Wasserman notes, are particularly lopsided because Democratic districts are “heavily urbanized,” with huge numbers of Dem voters concentrated in them around Columbus, Cleveland, Philadelphia, and Pittsburgh.

Numbers.