LIBERAL DEMOCRACY INDEX (LDI) V-Dem INSTITUTE (2024 data, 2025 report)
A democracy can be liberal but still fragile. So it depends on what you're measuring, because the US system has never been very robust and it's become increasingly weakened by the political system putting an emphasis on us vs them.
I understand that and in principle I agree, but the level of media consolidation in the US, voter suppression laws, gerrymandering, the level of executive power, the supreme court shenanigans.. I don't know but none of these things seem "democratic" to me and most of them don't seem very "liberal" either. I think in a lot of these indices there is an inherent ideological bias which leads to blindness to certain autocratic tendencies while they probably punish other autocratic tendencies too harshly. Romania is definitely a problematic case, but giving it a 0.44 while America received a 0.75 is wild. Like seriously wild. Not justifiable in my opinion.
EDIT: I just caught that but Canada was ranked lower than the US. Isn't that insane?