Edit: Image is from this Reuters article deconstructing Trump’s latest rally.
Do you not think it’s odd that republicans have such dedicated voters while democrats have such non-committal voters? Why do you think that is?
Wild speculation: republicanism only exists as a cult created by the propaganda of a political party. Of course one of the core tenets of such a cult would be voting above all else. The Democratic voters are all the other, non-cult members who don’t have any such religious fanaticism about voting
As late as 1980s, the GOP had a Liberal wing. Once Reagan got his claws firmly embedded the Right was able to marginalize or remove them.
There’s an old saying in US politics; Democrats fall in love and GOP fall in line. GOP will vote for any candidate with an R next to their name, and the Dems want someone they can get excited about.