What Did Trump Know and When Did He Quit Knowing It?

…Trump had previously denounced Duke during a Q&A at a rally on Friday, and in another interview in August.

But Tapper insisted he do it on national television.

“I don’t know anything about what you’re even talking about with white supremacy or white supremacists,” Trump responded, pleading ignorance. “So I don’t know. I don’t know — did he endorse me, or what’s going on? Because I know nothing about David Duke; I know nothing about white supremacists.”…