Whenever the subject of intelligence testing comes up, especially in the context of racial and ethnic differences in intelligence, or disparate outcomes in education, liberals can always be counted upon for their skepticism towards the entire subject of IQ testing. They will usually claim that the tests are either biased or don't measure anything real - as in "IQ measures the ability to take an IQ test". This is of course ironic, since individual differences in intelligence as measured by IQ testing is the most established and robust finding of modern psychometrics, and liberals constantly proclaim their devotion to science, only inbred conservatives being opposed to scientific findings.
But liberals become IQ believers when something like this happens: Low IQ & Conservative Beliefs Linked to Prejudice.
Some of the quotes from the article show how a study like this operates. For instance:
Social conservatives were defined as people who agreed with a laundry list of statements such as "Family life suffers if mum is working full-time," and "Schools should teach children to obey authority."
I guess smart liberals believe that a mother working outside the home full-time couldn't possibly have any downside for family life, and that their indoctrination of schoolkids in things like environmentalism, global warming, and the essential evilness of America's past don't constitute teaching children to obey their authority.
The essential point to make here is that the average Democratic Party member is very likely not as intelligent as the average Republican, since the Democratic Party contains more minorities, who on average score lower on IQ tests than whites. But once you point out something like that, liberals go into IQ denial.