Britain weighs the economic cost if charities go bust.
Many Americans had less of an incentive to give, as the law doubles the standard deduction.
But it's currently being investigated by the New York attorney general's office.
Charities overheads differ starkly but may not be a big determinant of who gives.
The Susan B. Komen for the Cure breast cancer charity announced this morning that it is cancelling fundraising walks in seven cities in 2014. How much do they actually make from similar walks?