President Donald Trump’s current Homeland Security Secretary had a noteworthy appearance on live television for all the wrong reasons. Trump, 80, handpicked former GOP Senator from Oklahoma, Markwayne Mullin, to head the Department of Homeland Security after firing Kristi Noem. Mullin, 48, took over the federal agency amid outrage over how Noem, 54, mishandled immigration enforcement-related detentions and fatal shootings. Those scandals cast a…