Over a period of months, Mr. Trump’s top economic advisers, led by Gary D. Cohn, the director of the National Economic Council, repeatedly said a concrete infrastructure proposal was coming but no such plan had materialized, despite heavily promoted events like White House “infrastructure week.”
Now, White House officials say they are ready — after months of what they characterized as behind-the-scenes meetings with members of both political parties — to push through a plan that they concede will not be enacted without the support of both Democrats and Republicans.
The odds of such a bipartisan effort coming together in the current political environment are long. White House officials said the new spending would be offset by unspecified cuts elsewhere in the budget, which are all but certain to be roundly criticized by Democrats.
Many infrastructure experts consider the ratio Mr. Trump’s aides are proposing for a public-private plan — essentially creating $6.50 in private investment for every federal dollar spent — to be largely out of reach. And the president plans to leave it up to lawmakers, who are deeply divided on how to finance any infrastructure effort, to decide on key questions such as whether to enact a gas tax to pay for it or slash other types of spending.
“The president has said that he is open to new sources of funding,” a senior White House official told reporters on Saturday, speaking on the condition of anonymity to describe the plan in advance of its release. “We will be quite flexible in terms of how we accomplish those objectives.”
The plan also proposes $20 billion for so-called transformative programs, described by the official as “next-century” infrastructure, and it would set aside $10 billion for a capital financing fund to handle projects that the federal government is currently building.
To expedite the building of infrastructure projects, Mr. Trump will propose a new “one agency, one decision” model in which one federal agency would take the lead in moving a project through the permitting process within 21 months, with final action within three months after that.
The official said the White House wanted to shorten the process while preserving environmental protections that exist under current law.
But progressive groups and public interest organizations rushed to condemn the plan on Sunday, arguing that Mr. Trump was trying to gut environmental rules under the guise of an infrastructure initiative.
“President Trump’s infrastructure proposal is a disaster,” Shelley Poticha, the managing director of the Healthy People & Thriving Communities Program at the Natural Resources Defense Council, said in a statement. “It fails to offer the investment needed to bring our country into the 21st century. Even worse, his plan includes an unacceptable corporate giveaway by truncating environmental reviews.”
Business groups, however, broadly praised the president’s forthcoming proposal, saying it represents a long overdue investment that would provide a boost to American companies.
“In calling for a substantial, $1.5 trillion investment, President Trump is providing the leadership we have desperately needed to reclaim our rightful place as global leader on true 21st-century infrastructure,” said Jay Timmons, the president and chief executive of the National Association of Manufacturers. “There is no excuse for inaction, and manufacturers are committed to ensuring that America seizes this opportunity.”