In this video, Senator Hirono explains that Democrats have a difficult time connecting to voters because, like the worst math teacher you ever had, they are simply too smart.
Ms. Hirono with her enormous brain should be able to understand this: According to the General Social Survey (GSS) data, those of us who vote Republican have higher average IQs than those pull the lever for Democrats.
The most recent data we have is for 2012. GSS participants are given a 10-question vocabulary quiz, which is a serviceable measure of IQ. I converted the vocab scores to IQ scores, setting the mean at the US average -- 98 (Did I just hear the fish from SpongeBob say, "WAH, Wah, wah"?). More than 2,000 people were also asked about their 2012 vote.
The results? The mean IQ score for those who voted for Obama was 97.0. For Romney, it was 99.1. Not even close.
UPDATE: Even more depressing news: The actual mean IQ in the US is more like 97 than 98, so we can adjust the Dem mean down to 96.0, and the GOP mean down to 98.1. And if current immigration trends continue, we can all look forward to those numbers continuing to drop over the next few decades.