I have been gratified by Grahamnesty's recent bouts of showing some spine but have felt that it won't be proved to be for real until he is tested on an amnesty vote. Either (i) Grahamnesty was under the spell of McCain and with McCain's demise the spell is now broken (like King Théoden being under the spell of Wormtongue in Lord of the Rings) and Grahamnesty is now for national sovereignty and secure borders or (ii) he is doing the typical 6 year senatorial cicada metamorphosis from a moderate squish into a conservative as his reelection nears.
I believe it’s (ii).