US Senate passed a housing rescue bill Saturday aimed at sparing 400,000 struggling homeowners from foreclosure. President George W. Bush is expected to sign the measure quickly. The measure, approved by a 72-13 vote during a rare weekend session in the Senate, lets homeowners who cannot afford their monthly mortgage payments refinance into more affordable government-backed loans rather than losing their homes. The bill also offers a temporary financial lifeline to the troubled giant mortgage companies Fannie Mae and Freddie Mac, and tightens controls over them. There would be higher limits on loans that Fannie Mae and Freddie Mac can buy and the Federal Housing Administration can insure. The loans would be capped at $625,000. Those ailing companies back or own $5 trillion in mortgages, or nearly half the US total. The rescue plan is intended to prevent the two pillars of the home loan market from failing and causing broader market turmoil. Bush initially said the proposal was a burdensome bailout for irresponsible borrowers and lenders. But he dropped a threat to veto it this week after Treasury Secretary Henry M. Paulson argued that the support for Fannie Mae and Freddie Mac was vital to calming markets in the US and abroad. Bush opposed $3.9 billion in the bill that would help neighborhoods devastated by the housing crisis buy and fix up foreclosed properties. The administration argues this would hurt homeowners by giving lenders an incentive to foreclose rather than help people stay in their homes. Supporters said the bill was a long-overdue response to the mortgage meltdown and would help boost the sagging economy. Democrats bashed Republicans for delaying the measure and forcing the Saturday session. The House approved the bill on Wednesday. Homeowners struggling to make their house payments could get government mortgage relief under a rescue plan that seeks to revive the chaotic housing market and help reverse the economic downturn. The bill gives the government power to throw troubled mortgage giants Fannie Mae and Freddie Mac a financial lifeline, in efforts to prevent the two pillars of the home loan market from going under and causing broader market turmoil. It is designed to help an estimated 400,000 homeowners escape foreclosure by letting them refinance into more affordable loans backed by the Federal Housing Administration. The Senate on Friday cleared the last hurdle to its passage on a 80-13 test vote that showed broad support for the election-year package. Bush, who initially called it a burdensome bailout for irresponsible borrowers and lenders, dropped a threat to veto it this week after his Treasury Secretary, Henry M. Paulson, argued the backstop for Fannie and Freddie was vital to calming markets in the US and abroad. That was despite his opposition to $3.9 billion the bill sends to neighborhoods devastated by the housing crisis to buy and fix up foreclosed properties. The administration argues that would hurt homeowners by giving lenders an incentive to foreclose rather than help people stay in their homes. Supporters called the bill a crucial and long-overdue response to the mortgage meltdown that would be a key ingredient to boosting the sagging economy. “Unless we provide some type of footing for housing in the United States, I do not think that the economy will begin to recover. It is perhaps the most significant economic issue that we face,” said Sen. Jack Reed, D-R.I. “This legislation is going to be the linchpin that helps millions of families have decent, safe and affordable housing.” Paulson's request for the emergency power to rescue Fannie and Freddie helped forge a bipartisan deal on the legislation, which also creates a new regulator with tighter controls on the government-sponsored mortgage firms - something Republicans have long sought.