Former Sen. Pat Toomey on Fitch's U.S. downgrade: We are on an unsustainable fiscal path

Former U.S. Senator Pat Toomey (R-Pa.) and former U.S. Senator Heidi Heitkamp (D-N.D.) join 'Squawk Box' to discuss the fallout from Fitch's U.S. rating downgrade, what can be done about the growing debt, and more.