Astrology apart, I can understand why the wealthy, and better-off land-owners, farmers, ranchers, lesser aristocracy (in the UK), or well-heeled professionals etc would vote conservative/Republican. I have never understood why everyday people of modest means at best, ranging to those in virtual poverty, would even consider voting conservative/Republican. They do. They vote conservative/Republican in droves.
I lived in various locations in the UK for more than 60 years, and in south-west Oklahoma for the past 11 years. Same thing happens in both countries, though I do believe it's more obvious here in the USA where, in certain areas, there exists more severe poverty.
Googling around the net, realising that many others must have puzzled over this same question, I found a few suggestions, which boil down, in a few words to:
Pursuit of aspirations, a bit of mild social climbing - mistakenly assuming conservatives will help lift them "up" to join, if not the golden ones, at least the rhinestone crowd.
The "I'm alright, Jack!" syndrome (well-known in the UK) prevalent in those who have secured a decent job and could not care less about other unfortunates, so vote conservative to ensure their taxes remain at lowest possible level.
Propaganda from radio, newspapers and TV (I'd add churches too, for the USA). Misguiding gullible, trusting folk whose knowledge of politics is skimpy, if any at all, and they lack or energy time to pursue more information, being hard pressed to work enough hours to feed their families.
A feeling that "liberals", who are often seen as "the elite" in the USA, look down on the less well-off and the poor, who then group together and vote "the other way", not realising that voting conservative/Republican is not going to change a darn thing - only make it worse!
Personally, I could never ever, ever, ever vote conservative/Republican - nor for any Democrat who is not truly of the left-wing (most of 'em here in the USA are really not of the left). Whether this is due to something in my astrology, or in my ancestral DNA of generations of serfs in feudal England, I know not.