You can estimate that by looking at their SAT/ACT scores (which are intelligence tests to a large degree) and converting the percentile to IQ norming (mean 100,

You can estimate that by looking at their SAT/ACT scores (which are intelligence tests to a large degree) and converting the percentile to IQ norming (mean 100, std dev 15). For Obama you get IQ 130, for George W. Bush 123.