Whatever It Takes to Rebuild Act - Amends the Robert T. Stafford Disaster Relief and Emergency Assistance Act to: (1) authorize the President to make disaster loans to any state government that suffers a substantial loss of tax and other revenue as a result of a major disaster and demonstrates a need for financial assistance in order to perform its governmental functions; (2) repeal the $5 million cap for disaster loans; and (3) exempt a disaster loan made to a state or local government that suffers a substantial loss of revenues as a result of a major disaster the President determines to be a catastrophic event from the percentage of the annual state or local government operating budget limitations and from the payment of any interest or principal.