Homeland Security nominee faces tough questions from lawmakers

President  Barack Obama’s choice to be second-in-command of the Department of Homeland Security Alejandro Mayorkas is facing tough questions in his confirmation hearing. He’s under investigation for his role in helping a company run by Hillary Clinton’s brother secure an international investor Visa for a Chinese executive. NBC’s Michael Isikoff joins NewsNation with more details on Mayorka’s confirmation hearing.July 25, 2013