[ivraatiems]

I'd say in the US, the right has a lot more power-in-fact than the left, but the left may have more of the popular will. The fact that the two aren't aligned is the result of our relatively shitty system, frankly. (And even so, the right is having such an identity crisis right now, it's hard to say it has total power.)

As far as "no true Scotsman" - we can't prevent people from associating with groups, but we can call them out when their ideals don't match those of the group, and we can hold them to account if they behave in ways that contradict the group's values or are a bad-faith application of those values. I think the left is... okay... at doing that, and the right is often pretty bad, but neither is exactly great. We're also bad at doing it proportionally, and at seeing people as sometimes good, sometimes bad, sometimes agreeing with us, sometimes not. But that's another problem.