RCP doesn’t do anything more than arithmetic. They take all the poll results for a particular state and compute an average result from them. The races they are “changing” are the no tossup ones. This occurs when new polls change the average result from favoring one candidate to another. Their other map, with toss ups, gives a better idea of what the polls are saying about the race. The no tossup map is misleading.
For example if there are 5 polls in a state with results of Biden +1, +2, +1, and Trump +2 and +1, the average would be Biden +0.2. Obviously it’s a tossup. Suppose that the poll that had Biden +2 issues a new result showing the race tied. The new average would be Trump +0.2 — that’s a change on the no tossup map, but it’s obviously not a real change in the actual status of the race; it’s still a tossup.
Yes. That's precisely why the Dems and their fake news media polls regularly game it to suppress Republican turn out.
They only tighten it at the very last minute to cover their butts.
It's the biggest con going.
Has been tore while.