It's a question that puzzles most liberals and bothers some conservatives. Why are so many modest-income white voters rejecting the Obama Democrats' policies of economic redistribution and embracing the small-government policies of the tea party movement?
It's not supposed to work out that way, say the political scientists and New Deal historians. Politics is supposed to be about who gets how much when, and people with modest incomes should be eager to take as much from the rich as they can get.
Moreover, as liberal economists and columnists point out, income levels for middle-class Americans remained stagnant for most of a decade during the George W. Bush presidency and then plunged in the recession. Housing values fell even more.
The conservative writer David Frum has made the same point and has said that Republicans must come up with policies that will raise ordinary people's incomes if they hope to win.
But the fact is that Republicans did pretty well among whites who did not graduate from college -- the exit poll's best proxy for the white working class -- even in the otherwise dismal year of 2008. John McCain carried non-college whites by a 58 percent to 41 percent margin, more than his 51 percent to 47 percent margin among college whites.
Barack Obama won because he carried all other voters 79 percent to 21 percent. But he carried non-college whites in only 14 states and the District of Columbia with 127 electoral votes.
Liberals are puzzled by this. Thomas Frank's book "What's the Matter With Kansas?" argued that modest-income whites were bamboozled by the moneyed elite to vote on cultural issues rather than in their direct economic interest.
But that's no more plausible than the notion that rich liberals from Park Avenue to Beverly Hills have been bamboozled to vote the opposite way on similar issues rather than for those who would extend the Bush tax cuts. People are entitled to base their vote on the things they think important. They don't always vote just to maximize their short-term income.
In any case, the cultural issues seemed to be eclipsed by economic issues in 2010, when Republicans carried non-college whites 63 percent to 33 percent in House elections. That was almost as large a percentage margin as the Democrats 74 percent to 24 percent among the smaller number of nonwhites.
My own assumption is that economic statistics have been painting an unduly bleak picture of modest-income America. When we measure real incomes we use inflation indexes, which over time inevitably overstate inflation, because they're based on static market baskets of goods.