A friend posted this link that has title "CNN Targets Thomas Jefferson Memorial – Says It Should Be Torn Down Because SLAVERY" which includes a shot of a dialogue between Ashleigh Banfield and DonLemon, discussing whether the same argument that was used to bring down the Confederate Flag in many places this week can/should be applied to the Jefferson Memorial.
Even the LATimes picked up this controversy without pointing out the obvious bad-faith misquoting by right-wing nutjobs.
This conversation was a follow-up to an interview Banfield had just completed with BenJones where he was arguing that the Flag should not be taken down.
So the top link above shows her discussing with Lemon a comment that Jones had made in pre-interview conversations. We don't have the quote for that, but it seems obviously that Jones had made the point, "well Jefferson owned slaves are we saying we should tear down the Memorial?", and so she was bringing up that idea with Lemon, about whether it's an appropriate equivalence. And Lemon said quite clearly that the 2 are not equivalent (and she obviously agreed). Yeah, Lemon went on to say "There may come a day when we want to rethink Jefferson. I don't know if we should do that." which is kinda vague, but certainly not anything like what the right-wingers are pretending anyone said.