The fact that they AR as Safe D is laughable, because the last time you could accurately assess an AR senate race was in 2004, when it was still D-downballot
Also not considering Dorgan’s retirement is laughable
Also the idea that Arlen Specter was required to win in PA is laughable
Predictions made two years out are always laughable. Honestly AR was somewhat reasonable considering that Mark Pryor didn't even have a Republican opponent in '08. Plus retirements are often unpredictable, and Arlen Specter was an institution in the state - how often do longtime incumbents like him lose reelection/renomination when not involved in a scandal?
Go back to March 2017 - NO ONE could have possibly predicted that an unknown congressman and former punk rocker from a safe D district would come within three points of beating Ted Cruz in Texas, and then be one of the top Democratic presidential contenders.
When they switch parties for political convenience