Your link to the roll call vote has Lamar Alexander as a Nay, not Yea. I retract my earlier comment about Lamar Alexander, although he failed to support the Coburn Amendement for concealed carry privileges in national parks. Thanks for linking the roll call vote.
Lugar (R-IN), Martinez (R-FL), Collins (R-ME), Voinovich (R-OH) and Snowe (R-ME) were the defectors after my personal inspection of the roll call vote. I have to wonder about your source for the story.
They also bear false witness to Gregg (R-NH) and Hatch (R-UT) who voted Nay.
I didn’t check the roll call vote before posted. I see the same as you.
Looks like Alexander, Gregg and Hatch voted NAY.