I doubt the effect of his politics is huge. Most people are totally unplugged from politics, and a lot of his buyers were Republicans anyway. Even the progressive people who hate him may still buy the cars because people don't often act on their beliefs.
I suspect the following have had bigger effects on their sales:
- Tesla being at the bottom of quality rankings (and lots of evidence of major quality issues)
- increasing numbers of fantastic EVs sold by other companies at all price points
- bad PR related to "FSD" and "Autopilot"
- higher interest rates preventing financially irresponsible people from buying cars for status
I suspect the following have had bigger effects on their sales:
- Tesla being at the bottom of quality rankings (and lots of evidence of major quality issues)
- increasing numbers of fantastic EVs sold by other companies at all price points
- bad PR related to "FSD" and "Autopilot"
- higher interest rates preventing financially irresponsible people from buying cars for status