I have, and as you well know, there is nothing anti-immigration about it. It's anti-illegal immigration, a different thing. You want to come to America, come legally. Otherwise, we'll come after you. Sounds like the principled conservative position to me.
Cilchrist isn't going to be able to hide from the AIP and its racist history. He knew what he was doing when he filed as their candidate. No one forced him to do it.
Now the reputation of AIP is on the line. If you can't win this Congressional race you can't win any. You can fight to win or you can pretend that you want to lose on principle, but you can not hide from the fact that this race will define the AIP.