People started taking notice at the Democratic nominee Barack Obama's daytime political rallies. They discovered that he is commanding an audience of anywhere between 35,000 and 50,000 on an average, whereas Republican nominee John McCain has been pulling somewhat lower numbers in the 15,000 to 25,000 range.
After some intensive studies were completed, the conclusion is clear: it's not that Obama is more popular, but that people who support John McCain are unable to attend his rallies... because they are actually at work.