In all fairness, those of you downvoting the parent need to address the following:

The FDIC receives no Congressional appropriations – it is funded by premiums that banks and thrift institutions pay for deposit insurance coverage and from earnings on investments in U.S. Treasury securities.

Source: http://www.fdic.gov/about/learn/symbol/index.html

I remember there being some talk about FDIC potentially needing to borrow from the Treasury during the financial crisis however as far as I know, it didn't happen.