Carlos Barria / Reuters
- Warren Buffett has spoken to the White House about investing in US regional banks, reports say.
- Buffett's Berkshire Hathaway provided critical funding to companies during the financial crisis.
- Berkshire made a fortune from those deals, but might have to agree less lucrative terms today.
Warren Buffett might come to the banks' aid once again — but he probably won't make as much money this time around.