North Carolina’s Republican senior U.S. senator on Friday evening called for the state’s embattled GOP gubernatorial candidate to make a decision: take accountability or take legal action. Lt. Gov. Mark Robinson has denied an explosive report this week from CNN’s KFILE that he praised slavery and called himself a “Black Nazi” on a pornographic message board years before entering politics. On Friday, another report surfaced a post in which the same account praised Adolf Hitler’s autobiographical manifesto. Sen. Thom Tillis, who has been in office since 2015, joined calls for Robinson to take ac…