'Who is Markwayne Mullin?': Fox Nation special chronicles 'whirlwind' DHS nomination Fox Nation chronicles Sen. Markwayne Mullin’s journey from plumber, wrestler and rancher to U.S. senator and DHS secretary nominee. NEW You can now listen to Fox News articles! Senate Democrats are set to grill Sen. Markwayne Mullin, R-Okla., during his confirmation hearing on Wednesday, his first hurdle to becoming the next Homeland Security chief. Mullin’s confirmation hearing before the Senate Homeland

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