His family with their values wouldn't be republicans now, regardless of the color of their skin.
You're waaaaay too confident there, Hot Rod.
As per your usual M.O. you skipped my argument entirely.
I'll restate it for you this one time.
How would the King family come to terms with their desire to help working people - particularly in their support of working people being able to organize for negotiations and rights - with the fact that the republican party is very plainly opposed to such things?
I'll even concede that the democratic party has done a craptacular job of protecting workers' rights, as shown by the stagnation of wages, the drop in union membership, the loss of job security, the decrease in job benefits, etc. This of course does far more to support my earlier arguments of our country being on a constant march towards the right than anything.
The fact of the matter is though that the King family was very concerned about the plight of the working class, and the republican party is not at all. If you want to make a claim that they would have been independent voters (perhaps of a Bernie Sanders alignment) you can go for that but they most certainly would not be voting republican.