Republican strategist Doug Heye apologized live on-air on Tuesday for previously mocking Democrat-turned-Independent presidential candidate Robert F. Kennedy Jr.’s voice. Heye cracked a joke about Kennedy’s voice during a Friday segment on CNN after the candidate suspended his campaign in major swing states and endorsed Republican nominee Donald Trump. The Republican strategist said on Tuesday that his remark about Kennedy was “totally out of bounds.” “Well let me say first, because you talked about R.F.K, last week I was on this network and I made a joke about the way he speaks, which is tota…