This could be an outlier. While the polls are showing a tightening, this just seems like too massive a shift.
I'd like to see some other polls.
OTOH, if this is accurate, Santorum is in full collapse. He's sinking faster than the Edmund Fitzgerald , if this is accurate.
But it seems to me that a great many on this forum seem to put a lot of stock in PPP polling.
There's a resason for it:
https://uselectionatlas.org/FORUM/index.php?topic=151643.msg3253143#msg3253143PS: Could still be an outlier though, I remember that PPP blew the 2008 DEM Primary in PA.