I don't know this to be true but I have read on multiple sites that it was leaked from Senator Bob Casey's campaign that his internal polling(widely considered better than public polling) showed Harris is down big in PA and thats what caused the movement in the betting markets.Makes sense as Harris has no realistic path to 270 without PA. Its worth noting that Michigan's Democrat Senate nominee also said in a leaked video that Harris is down in MI in her internal polling. Due to Joe Biden's disastrous presidency this race was over before it started.Biden and Harris polling worse than Hillary Clinton and Biden 2020 confirmed it.In the future maybe the Democrat Party will put their voters wishes above their corporate and billionaire donors and Benjamin Netanyahu wishes as millions of younger voters,progressives, Muslims and Black voters will no longer be voting for them just because the Republican nominee is bad.
Harris is playing it safe. Some Democrats worry that could doom her campaign. Democrats are concerned that she's acting like she's sitting on a lead in a tied race. https://www.nbcnews.com/politics/20...safe-democrats-worry-doom-campaign-rcna173504