Roberts was in that range for 3 of the past 10 years, so it's conceivable that he will return to that realm. There is certainly nothing to constrain him now. It's probably just as likely that he return to the 60 - 70% band and almost no chance that he stays at 90. Kansas Republicans aren't even in the 90% column, so that's not what we will see in the future.
So before you predicted he'll vote about "50%" conservative in the future, but now you're predicting he'll vote in the range of "60-70%" conservative. Sounds to me like you're hedging your bets and don't want me to hold you to the prediction that Roberts will morph into an Arlen Specter clone next year.
Interesting enough, even your fellow Wolf supporters on this thread disagree that Roberts is going to move leftward after he's re-elected. Ohioan noted:
>> a loss by only 7 or 8%, in a race against a long-serving incumbent, is generally seen as a very strong showing. I suspect that it will move Senator Roberts to the right, if anything. And the fact that he stood with Ted Cruz at a crucial moment, suggests that he will indeed move in that direction--not that he was ever a Left-Winger. <<
Finally, are you willing to admit that Liz Cheney cheerleaders have now been proven wrong when they insisted Mike Enzi was only voting solidly conservative because Liz Cheney was on the ballot against him?