You’ve got to be kidding. Even if Walker went pro-amnesty (and pro-open borders) for money from the Kochs, that assures he’s bought and paid for for a presidential run and any possible presidency.
I don’t want him anywhere near national office.
Walker was in a fight for his political life with arguably the most powerful -- and except possibly for the SEIU -- most radical union in the United States. Both he and his local fundraisers and supporters were being attacked and indicted by Wisconsin DA's with no scruples about abusing the powers of their several offices to bring him down. If, in extremis, he accepted money from the Koch's and took a conciliatory position toward a topic near and dear to them in order to survive, I would be willing to at least listen to a change in his position when he went to the national stage.
And, like you, I would be very skeptical of his motives and his direction.
But what I would not do is deliberately distort his position by presenting an old statement as yesterday's story. If you would, that reflects badly on you, and perhaps more importantly, on whatever candidate you evidently prefer.