Sen. Thom Tillis (R-N.C.) is threatening to disrupt Senate business over Kristi Noem's leadership at the Department of Homeland Security.Why it matters: Tillis, who is not running for re-election, has spearheaded GOP criticism of Noem in the narrowly divided Senate and seized on Tuesday's oversight hearing to turn up the pressure. Driving the news: At a Senate Judiciary Committee oversight hearing, Tillis berated Noem over stalled FEMA funding and agency responses, including for hurricane recove...