This isn't really the issue. Most of that lower nation-level population density is due to the fact that the US possesses some truly vast wilderness and wasteland within its territory. I'm no geographer, but I'm pretty sure there's no equivalent of the Nevada desert contained within France somewhere, let alone Alaska.

The real issue with the US is suburban sprawl. The population isn't too spread out on a national level; it's too spread out on a local level. If the US had European-style urban design, the existence of some vast empty wilderness won't affect things. We're talking about how the people in the inhabited parts of the land live. The wasteland is irrelevant.

Yup. It is simply harder to organize people, especially when the offending politicians can literally fly away to Mar-a-Lago. It costs a ton for people to get around the nation, there is no such thing as job security or universal health, and so on.

We will have to overhaul or replace the Constitution, with it having rules to at least allow for free fuel, basic housing, and free generic food. This would allow people to be freed from the shackles of the workplace, and be able to relentlessly protest against politicians.

You mean a country being 1,600% larger than another makes it harder for people to mobilize??