President-elect Donald Trump’s choice for defense secretary, Pete Hegseth called himself a change agent as his Senate confirmation hearing opens. Senators questioned whether the former combat veteran and TV news show host is fit to lead the U.S. military. It starts a weeklong marathon as the Republican-led Senate rushes to have some of Trump’s Cabinet picks ready to be confirmed as soon as Inauguration Day, Jan. 20. For details on the hearing and significance of this role, we spoke with Ben Friedman, Policy Director with Defense Priorities.