if that took place in a vacuum, you might be correct. Sure they could attempt to revoked concealed carry laws in their state, but they would then be answerable to the voters, and with the awakening of 2A rights supporters, that's going to be a difficult thing to vote for and stay elected.
I think you're giving way too much credit to the legislator-constituent relationship. I don't know too many elected officials who aren't vying for the perks of being a career politician which allows them to safely kiss a baby while stealing its lollipop. Even a staunch 2A politician can waver in their support if greased enough.