Why did the Democrats decisively lose this election? It’s not really a mystery. The 2010 midterms were shaped by three fundamental factors: the poor state of the economy, the abnormally conservative composition of the midterm electorate, and the large number of vulnerable seats in conservative-leaning areas. These trends cost the Democrats their House majority but were not strong enough to sweep them out in the Senate. What’s interesting is who voted for the Republicans and why.