Found that 2014 turnout was 9.3 million voters below expected turnout using US mid-term turnout rate average from 1914-2014 combined with preliminary data from Michael McDonald. Looks like most of them were voters in blue states. Only 15 out of 51 states/DC increased turnout beyond what was expected based on 1982-2014 turnout rate avg. Increase came in states with the most hotly contested rates. Looking at the broad rates of depressed turnout, it appears that $4 billion in incessant political spending tends to disproportionately turn off low interest Dems. Here is a summary of what I found:
Findings from a preliminary review of 2014 voter turnout statistics.