CHICAGO—Eager to calm economic anxieties, President-elect Barack Obama is rolling out an economic vision that will require congressional cooperation even before he settles into his new desk in the White House’s Oval Office.

Obama will introduce his new economic leadership team Monday, a key step toward enacting a huge new economic recovery plan that aims to save or create 2.5 million jobs over the next two years.

The plan is likely to far exceed the $175 billion Obama proposed during the campaign. It would include an infusion of money for infrastructure projects, new environmental technologies and tax cuts for low- and middle-income taxpayers. It will not call for tax hikes for the wealthy.

Obama aides on Sunday called on the new Congress to pass by the Jan. 20 inauguration legislation that meets Obama’s two-year goal of saving or creating 2.5 million jobs. Democratic congressional leaders said they would get to work when Congress convenes Jan. 6 with bigger Democratic majorities in the House and Senate.

With the wounded economy worsening, the Obama team’s new assertiveness was a recognition he needed to soothe financial markets with signs of leadership. It also foreshadowed a more hands-on role by Obama to influence congressional action during the final weeks of the transition.