I doubt that is accurate, we are talking of the entire betting market, and in the beginning it was already Biden which is the favorite and until now, so if majority of the bets are going into Trump, that could move the line in favor of trump, but look at the line now, Trump is still a heavy dog.

This article was on November 1, 2020.

https://www.actionnetwork.com/politics/2020-election-odds-presidential-race-donald-trump-joe-biden