As support for Treasury Secretary Timothy Geithner wanes on Capitol Hill amid frustration with the Obama administration's handling of the economy, JPMorgan Chase CEO Jamie Dimon is emerging as a potential replacement.

Sources tell The Post that a number of policy makers have begun mentioning Dimon as a successor to Geithner, whose standing in Washington has suffered because of the country's high unemployment rate, the weakness of the dollar, the slow pace of the recovery and the government's mounting deficit.