Peter Wehner, who has said that he left the Republican Party “because of Donald Trump,” explained in a Wednesday column published by The Atlantic, how Kamala Harris completed her mission of humiliating the ex-president during the candidates’ first debate Tuesday night. Emphasizing that he’s “never seen a candidate execute a debate strategy as well as Harris did,” in his 48 years of watching presidential debates, the former GOPer submitted that by forcing “Trump to go on the defensive,” the vice president successfully “broke her opponent.” “What Harris appeared to understand, better than anyone…