The first step in solving the problem is identifying it.
A vote for democrats is a vote for a white minority.
Keep the message simple, no hate, no white supremacy.
Just keep the demographic frozen right where it is, at 62% white
Make them defend their policy of white decimation.
Problem is, launching such a campaign will look explicitly racist. Even if we froze demographics at their present levels, they won’t stay put. Hispanics alone are outpacing Whites with having children. Whites aren’t having enough kids. Unless the numbers slack off on Hispanics and there is a dramatic cultural realignment, we’re going to end up with a substantial and permanent Hispanic underclass a la Mexico.
Besides, as I’ve said many times, just because a state has a high White population is no guarantee of political sanity. Look at Vermont. It hardly has any non-Whites, but they vote like they live in Castro’s Cuba. The San Francisco Bay area in California has large swaths of Whites, and wealthy ones at that, and the GOP is non-existent there.