Would it be possible for conservatives to infiltrate the NEA?
Yes. Send reinforcements.
Possible, but not many true conservatives are members of the NEA. I’m not, nor ever will be.
Possible, but difficult. How many conservatives are going to be willing to sit through years of Marxist indoctrination in ed school? And how many of them will be flunked out along the way because they can't or won't parrot lies well enough?