I can only assume he's afraid he/the GOP will lose some Southern voters if people actually believe he derided Sessions as a "dumb Southerner." I mean, he's lambasted the AG every other possible way, why not take ownership of this?
Trump denies calling Sessions ‘mentally retarded,’ ‘dumb Southerner’
President Trump in a tweet Tuesday night denied allegations in reporter Bob Woodward’s forthcoming book that he called Attorney General Jeff Sessions “mentally retarded” and a “dumb Southerner.”
Walking backsies, again?