They don’t. It’s quite simple: your party’s voters come out in both midterms and presidential years, while our party’s voters tend to take the midterms off. So when you look at these demographic breakdowns, you’re not seeing the same group of people alternate between voting more Republican and voting more Democratic. (Edited to add: you seem to have some understanding of this in subsequent posts, which makes it strange that you framed it as though the same voters are voting differently in midterms.)
Voter turnout in…
2008: 61.6% (highest since 1968)
2010: 40.9%
2012: 58.2% (still plenty high, despite your claim about the “last three elections”)
2014: 36.4% (lowest since 1942)
(Source: TIME magazine)
And yes, it’s frustrating that we can’t get our people out when there’s not a president on the ballot. It’s especially damaging in the Senate, where each seat alternates between midterm and presidential cycles (which, combined with your structural advantage in the sparsely populated Western states, makes it all the more amazing that we held the Senate for a good portion of the past decade).
But at least I actually understand what’s going on, instead of repeatedly thinking the public at large is shifting to my side as most of your base did in 2010 and 2014. But that’s good: conservatives learning the wrong lessons from every midterm makes our job easier. And our folks will be back next year, you can count on it (and then, alas, gone again in 2018…rinse, repeat).
With this kind of dynamic, what we as a party have to do is get the occasional “surge” as in the first two years of Clinton and first two years of Obama (with the help, hopefully, of a change in rules to eliminate the cloture rule in the Senate), pass a bunch of stuff during that time, and then after those two years, fight a holding action until our next shot comes around. And this, while not ideal, will slowly ratchet up progressive government as you guys are unlikely to get enough of your own “surge” to actually repeal anything (not to mention the fact that it’s always harder to undo programs once people get comfortable sucking on the teat of government, LOL).
Keep dreaming. From a November 2012 Politico article, emphases mine:
This was such a cherished belief you clung to, I *almost *feel bad for dashing your hopes. Almost. ![]()

