Most people with views labeled "anti-science" are very much believers in science in the abstract, they just believe that the commonly accepted science is perverted by ideological biases, political agendas and/or corporate corruption.
It's a form of anti-intellectualism: the belief that those who society considers the experts can't be trusted.
The belief that those who society considers the experts can't be trusted isn't anti-intellectualism; it's the basic premise behind Democracy. It requires the experts to not just decide, but also convince.
As Americans grow increasingly isolated and cynical, I expect confidence in science to continue to decline, much like confidence in every other institution.
Also I find it rather surprising 30%+ of Americans of any ideology will actually admit to believing in Astrology.