Not really, 2k is enough to have a result with a pretty low error %.
You’re totally right, my statistics is very rusty, good lord. For the ~240M eligible voters in the US, you can get roughly 2% margin of error, for the usual 95% confidence level.
My comment was a bit daft, in retrospective. Surely the polling people know what they’re doing, better than I do for sure x)
I guess it goes to show how non intuitive some statistical methods can be at first?