Democratic former Gov. Phil Bredesen speaks at a summit on the opioid crisis put on by Healthy Tennessee, Friday, Aug. 24, 2018, in Nashville, Tenn. Bredesen said Friday that his first action in the U.S. Senate would be to file or co-sponsor legislation to repeal a 2016 law criticized for weakening federal authority to curb opioid distribution. The announcement sought to put his opponent, Republican U.S. Rep. Marsha Blackburn, on the spot for supporting the law. (AP Photo/Mark Humphrey)
As chairman of the Senate foreign relations committee, U.S. Sen. Bob Corker is regularly briefed on threats to the United States from around the globe.
But the retiring, two-term Republican insists the greatest danger facing America isn't from ISIS, North Korea or Russia, but from the growing federal debt Corker calls a "dangerous crisis staring us in the face."