An IQ test IS a test of the ability for rational thought or reasoning.
My brother is the most rational, unemotional person you will ever meet. I don’t know what his IQ is, but the school district said that he tested higher than anyone they had ever tested in our district.
He is totally unemotional except where his own interests are concerned.
I don't think any FR posters would make the case that the bulk of the members of the Obama camp are IQ challenged, and their own claims are that they have tested much higher than at least the GWB team, if not 90% of America. They do, however as a group seem to have less common sense than any group heretofore.
And again, speaking from my personal experience, the folks I've dealt with who were identified as such or professed to possess significantly higher than normal IQ, without exception made day to day decisions and held opinions which seemed at odds with a high IQ.
If your brother is better capable, your entire family is fortunate.
Others have not seemed so.
The ones I personally know are not so fortunate, and in the case of the the brainiacs in the Ob camp, we are all worse off for it.