Donald Trump's Homeland Security Secretary Markwayne Mullin clashed so heatedly with a Democratic lawmaker at a committee hearing that even the Republican chairman lost patience with him. Mullin got into a finger-pointing argument with blue-haired Democratic Representative Rosa DeLauro on Capitol Hill Thursday during a debate over the administration's child separation policy for undocumented migrants. Mullin accused DeLauro of being a 'hypocrite' for being outraged over children separated under Trump when she 'didn't say a word' about the minors who went missing during Joe Biden's tenure. 'Don't interrupt me!' DeLauro screamed at Mullin, pointing her finger at the DHS secretary....