The major issues [0] included things like the economy, foreign policy, violent crime and immigration. Which generally favour Trump & the right wing. I don't understand the lack of strategic empathy among some on the left for being realistic about what people are focusing on. The election was close to a coin flip, obviously the democrats didn't have a big advantage.

Climate change might not even be a major issue any more, people are cooling to it.

[0] https://www.pewresearch.org/politics/2024/09/09/issues-and-t...