I think I've got it, "keeping to the high road" means "staying stoned out of their minds." OK, now that sentence is starting to make sense. I was having trouble figuring out how branding millions of non-racists as racists was even slightly ethical.
That’s probably the funniest sentence in the whole piece. When did a Democrat ever not shout how great his achievement was, no matter how small, no matter if it even was his to shout about?