>because those two-parent families tend to vote for the other party, and one-earner families have kids that vote for their party This confuses cause and effect

>because those two-parent families tend to vote for the other party, and one-earner families have kids that vote for their party This confuses cause and effect. Two-earner families tend to be two-earner families because you need two incomes in expensive cities (which vote D regardless of familial status). Single-earner families get much on much less in smaller cities and rural areas that tend to be more conservative.