US Senator Markwayne Mullin, Republican from Oklahoma, tapped by US President Donald Trump to replace US Homeland Security Secretary Kristi Noem attends a St. Patrick's Day breakfast hosted by US Vice President JD Vance and Second Lady Usha Vance in honor of the Taoiseach of Ireland Micheál Martin at the Vice President's residence in the US Naval Observatory in Washington, DC on March 16, 2026. The Irish prime minister arrived in the United States March 13 for an annual St Patrick's Day trip under pressure to talk tough to US President Donald Trump amid the Iran war. (Photo by ROBERTO SCHMIDT / POOL / AFP via Getty Images)