The official Republican platform, released this week, omitted a national abortion ban as an ambition for the first time in 40 years.

Project 2025 also calls for limits to be placed on Medicare claims, to “disincentivise permanent dependence” on the health insurance programme among over-65s.

Trump was forced to furiously backpedal earlier this year when he appeared to be considering cuts to Medicare. The newly released Republican platform vowed to maintain current levels of spending – softening another longstanding position.

Kevin Roberts, the foundation’s president, had said he believed the document would help transform US politics.

“We are in the process of the second American Revolution, which will remain bloodless – if the Left allows it to be,” he said.

In total, 31 authors and editors of Project 2025 were Trump administration officials, according to the Biden campaign.

The director is Paul Dans, who served in the Office of Personnel Management during Trump’s term in the White House. The document was co-edited by Steven Groves, who spent three years in the administration, while Spencer Chretien, the former special assistant to the president, is the project’s associate director.

One chapter was written by Russ Vought, Trump’s director of the office of management and budget. Earlier this year, Trump named Mr Vought as policy director to craft the Republican party platform ahead of its national convention.

Ed Martin, the platform’s deputy policy director, leads a conservative pressure group listed on the Project 2025 advisory board.

Stephen Miller, a longtime Trump adviser, is the president of America First Legal, which also advises the project, and appears on a video promoting its “presidential transition academy”.

Ben Carson, Trump’s former housing secretary; Peter Navarro, the former White House trade adviser; and Mark Meadows, Trump’s final chief of staff, are all involved in the project.