Mr. Obama’s aides said any surge of such a sentiment could complicate efforts to win Congressional approval for the additional bailout packages that Mr. Obama has signaled will be necessary to stabilize the banking system…

Beyond that, a shifting political mood challenges Mr. Obama’s political skills, as he seeks to acknowledge the anger without becoming a target of it. A central question for Mr. Obama is whether his cool style — “in a time of crisis, we cannot afford to govern out of anger,” he said in his address to Congress last month — will prove effective when the country may be feeling more emotional…

For all his political skills and his capturing of the nation’s desire for change in the 2008 election, Mr. Obama, a product of Harvard Law School who calls upscale Hyde Park in Chicago home, has shown little inclination to strike a more populist tone. The danger, aides said, is that if he were to become identified as an advocate for the banks and Wall Street, people could take out their anger on him.