This is interesting news from the WaPo:
The administration's proposal contains two pieces. First, it would empower a government agency to take on the new role of systemic risk regulator with broad oversight of any and all financial firms whose failure could disrupt the broader economy. The Federal Reserve is widely considered to be the leading candidate for this assignment. But some critics warn that this could conflict with the Fed's other responsibilities, particularly its control over monetary policy.One of the defenses of Geither's plan is that you'd never get straight up nationalization through Teh Congress, and it seems pretty likely you'd need to go through them since it doesn't seem the Prez has the blanket authority to seize any business he wants(probably a good thing). Looks like they're planning ahead.
The government also would assume the authority to seize such firms if they totter toward failure.
Besides seizing a company outright, the document states, the Treasury Secretary could use a range of tools to prevent its collapse, such as guaranteeing losses, buying assets or taking a partial ownership stake. Such authority also would allow the government to break contracts, such as the agreements to pay $165 million in bonuses to employees of AIG's most troubled unit.
The Treasury secretary could act only after consulting with the president and getting a recommendation from two-thirds of the Federal Reserve Board, according to the plan.