The interviews above are backed up by a multiple-choice Zogby poll. Some of the results, via How Obama Got Elected
57.4% could NOT correctly say which party controls congress (50/50 shot just by guessing).
81.8% could NOT correctly say Joe Biden quit a previous campaign because of plagiarism (25% chance by guessing).
82.6% could NOT correctly say that Barack Obama won his first election by getting opponents kicked off the ballot (25% chance by guessing).
88.4% could NOT correctly say that Obama said his policies would likely bankrupt the coal industry and make energy rates skyrocket (25% chance by guessing).
56.1% could NOT correctly say Obama started his political career at the home of two former members of the Weather Underground (25% chance by guessing).
Only 13.7% failed to identify Sarah Palin as the person on which their party spent $150,000 in clothes.
Only 6.2% failed to identify Palin as the one with a pregnant teenage daughter.