President Obama rolled out a $3.7 trillion budget blueprint Monday that would trim or terminate more than 200 federal programs next year and make key investments in education, transportation and research. The plan is aimed at boosting the nation's economy while reducing record budget deficits.

In a news conference at a Baltimore County middle school, Obama cast the document as a responsible alternative to the deep spending cuts that Republicans will urge in a vote this week on the House floor. Obama's plan would trim domestic spending by hundreds of billions of dollars over the next decade, striking hard at programs long favored by Democrats to make room for targeted increases in energy and medical research, corporate research and development and a new network to bring high-speed Internet access to 98 percent of Americans.

However, Obama also would rely heavily on new taxes, to a degree unacknowledged by administration officials in recent days. His budget request calls for well over $1.6 trillion in fresh revenue over the next decade, much of it through higher taxes on the wealthy and businesses.

Households with income of more than $250,000 a year would immediately see new limits on the value of their itemized deductions. And starting in 2013, they would lose the lower tax rates and other breaks that were enacted during the George W. Bush administration and recently extended.

The president proposes to hit businesses with an array of proposals he has offered in the past, including an end to subsidies for oil and gas companies, new taxes on hedge fund managers and a $30 billion fee on financial institutions aimed at repaying taxpayers for the federal TARP bailout.

The cuts target defense, heating assistance and the environment.

The announcement was Obama's opening argument in what is likely to be months of debate with congressional Republicans who want to see deeper cuts.

He cast the reductions as necessary but also said that more funding for scientific research, innovation and education were essential to keep American competitive with other nations.

"It would mean cutting things that I care deeply about," Obama said. "But if we're going to walk the walk when it comes to fiscal discipline, these kinds of cuts will be necessary,"

He said that "while we are absolutely committed to working with Democrats and Republicans to find further savings ... we can't sacrifice our future in the process."

Obama described his education initiatives as "investments in the future" and said he would fight for more funding. His budget proposal includes $40 million for training math and science teachers in elementary, high school and college classrooms.

Although Obama seeks an overhaul of the corporate tax code to lower the 35 percent rate on corporate profits, his budget does not make that costly adjustment. Instead, it offers previous proposals to eliminate tax breaks for corporations that do business overseas, reaping $129 billion in new revenue through 2021.