President Barack Obama promised on Saturday to do "all that's necessary" to boost the economy and warned, in an opening shot at critics of his budget proposals, that the country had tough choices ahead. Obama, who has rolled out a series of proposals to address the economic crisis since taking office on January 20, expressed confidence those initiatives would work even as jobless figures rise and the economic picture worsens. "From the day I took office, I knew that solving this crisis would not be easy, nor would it happen overnight, and we will continue to face difficult days in the months ahead," he said in his weekly radio address. "My administration is committed to doing all that's necessary to address this crisis and lead us to a better day." While touting his stimulus bill and measures to prevent home foreclosures, the president also previewed a potential fight over his $3.5 trillion budget for fiscal year 2010. "Like every family going through hard times, our country must make tough choices," he said. "In order to pay for the things we need -- we cannot waste money on the things we don't." In his radio address, Obama linked budgeting procedures under previous administrations to callous behavior on Wall Street that helped cause the financial and economic crises. "We've inherited a budgeting process as irresponsible as it is unsustainable. For years, as Wall Street used accounting tricks to conceal costs and avoid responsibility, Washington did, too," he said.