WASHINGTON -- Facing voter anger over mounting budget deficits, US President Barack Obama will ask Congress to freeze spending for some domestic programmes for three years beginning in 2011, administration officials said Monday. Separately, Obama unveiled plans to help a middle class "under assault" pay its bills, save for retirement and care for kids and aging parents. The spending freeze would apply to a relatively small portion of the federal budget, affecting a $477 billion pot of money available for domestic agencies whose budgets are approved by Congress each year. Some of those agencies could get increases, others would have to face cuts; such programs got an almost 10 percent increase this year. The federal budget total was $3.5 trillion. The three-year plan will be part of the budget Obama will submit February. 1, senior administration officials said, commenting on condition of anonymity to reveal private details. They said Obama was expected to propose the freeze Wednesday night in his State of the Union address. The Pentagon, veterans programmes, foreign aid and the Homeland Security Department would be exempt from the freeze. The savings would be small at first, perhaps $10 billion to $15 billion, one official said. But over the coming decade, savings would add up to $250 billion.