Anti vaxxers like Rand Paul ? I'm. Not saying the democrats are always pro science but the republicans are always anti science and never pro science.
What is it about Republicans them makes so anti-science? I don't think they are uniformly anti-science, but rather they think of science in different ways depending upon the end result they are aiming for. In general:
1. Science conflicts (in their eyes) with Christianity (many Muslims believe it conflicts with Islam in the same sense). Science tells them we evolved which contradicts their literal interpretation of the Bible.
2. Science costs money. This conflicts with their general idea that the Federal government spending money is somehow bad. They do not think of Science as an investment. Rather, they believe Science just happens spontaneously by universities and companies, with a preference for the latter because then they can see something tangible. This is very close to them thinking that all theory is wasted, just produce something from the research, no one needs no stinkin' theory.
3. Scientists are mostly left of center. Well, those at unis are, so Republicans will be damned if they are going to support them via Federal research grants.
4. Science conflicts with their thirst for profits so they can retire in luxury, preferably before they are 40. Science says there are external costs that should be considered (global warming, etc.) which, if they were paid for, would reduce them to retiring at 65. This is dangerously close to their belief that G-d said in the Bible that man shall have dominion over all the Earth and all its creatures...which they interpret as being able to screw it up to their hearts content. And if they screw too hard, Jesus will come back to save them or tell them to stop screwing because they are producing too many mouths to feed...Jesus will provide, they can generate as many sprogs as they like.
5. They are essentially that crowd of hacks you saw in high school that were part of the cool crowd who miserably failed to learn anything, last of all science (the Left has a lot of these as well). So they do not know what to make of it. Science is confusing, it takes a lot of time to understand much less so, to do, so better relegate it to the uncool crowd they remember from high school that they never liked in the first place.