Din ding ding.
Their final 2020 poll had Biden winning Oh and Fl
Trump won OH by 8 and Fl by 3.5
I cant recall the last time Quinnipiac polling didn’t have democrats up at least 4 points (or more) higher than their final performance. I really don’t know how they are considered a top tier polling outfit any longer they have been off so badly for so long.
Reliable polling is expensive and requires large sample sizes and talented people skilled in statistics and demographics. Paid for by political parties and major campaigns, such polls are rarely disclosed to the press or otherwise made public. Done properly and read with care, polls help allocate money and other resources, sometimes with decisive effect.
In the 2000 election, George Bush just barely carried Florida because, even though media's election day exit polling showed the state going for Gore, we (the Florida GOP and the GOP's best pollsters) knew that the methods used by the news media were flawed and that the Republican leaning Cuban vote had been grossly under sampled. On that basis, Republican election day get out the vote phone calls were shifted to the Florida Panhandle, which was becoming GOP territory and stayed open an hour later than most of the state due to a time zone difference.
The result was that with extra votes from the Florida Panhandle, George W. Bush just barely carried the state and won the Presidency, with a highly disputed but legitimate count in Florida putting him over the top.