Republican US presidential candidate Donald Trump suggested that one of his fiercest critics within the party, former congresswoman Liz Cheney, should be subjected to gunfire. Trump poured out the violent imagery at a campaign event in the swing-state of Arizona on Thursday night. “She’s a radical war hawk,” Trump said of Cheney, who is the daughter of former vice president Dick Cheney. “Let’s put her with a rifle standing there with nine barrels shooting at her, OK? Let’s see how she feels about it. You know, when the guns are trained on her face,” he told right-wing talk show host Tucker Car…