Pennsylvania has long been viewed by election analysts as a potentially decisive state in the 2016 presidential contest, but new polls out of the Keystone state show a race that isn't even close.

A Quinnipiac poll released Tuesday shows Donald Trump getting trounced by Hillary Clinton in Pennsylvania by 10 points (52 percent to 42 percent) in a head-to-head matchup and by 9 points when Libertarian Gary Johnson is included.

The poll is a sharp reversal from the pre-convention Quinnipiac poll that found Trump leading Clinton by 2 points in Pennsylvania. The July survey, which had been the only poll of 2016 showing Trump ahead in Pennsylvania, was probably too good to be true for Republicans at the time. But the latest Quinnipiac poll is in line with other post-convention polls: Clinton now leads Trump by 8.8 points in the RealClearPolitics average of polls in Pennsylvania.