Your whataboutism is irrelevant.
I'm a noob when it comes to polls or complex statistics, I do have an open mind though and willing to be educated.
From a common sense pov, 3 opinions do not encapsulate 2500 opinions.
At 1800, the math works out to be a 2.5% margin of error for a population of 250mil.
Since 250mil is 75% of 332mil (2022 US pop), that puts the margin of error at 25% less of what it should be. Twenty five % of 2.5 is .62, therefore margin of error of 1800 for a 332mil population is 3.1%.
Correct me if I'm wrong.
https://www.robertniles.com/stats/margin.shtml