Acosta might have been pretending not to know the facts merely as a ploy to bring up the Russia hacking story. It's pretty obvious that all CNN's anchors have been ordered to bring up the hacking story in every interview. It shows how desperate the Deep State is to keep Russia as America's No. 1 scary enemy. Without that powerful scary enemy there would be little justification for our ridiculously large Pentagon budgets, which have enriched the Deep State and the usual Wall Street suspects for the last 75 years or so. So it goes.