“Today, the department of state and the US agency for international development (USAID) have notified congress on their intent to undertake a reorganisation that would involve realigning certain USAID functions to the department by July 1, 2025,” US secretary of state Marco Rubio said in a statement.

The state department, he said, also plans on “discontinuing the remaining USAID functions that do not align with administration priorities”.

“Unfortunately, USAID strayed from its original mission long ago,” he said.

“As a result, the gains were too few and the costs were too high.”

After taking office in January, Republican President Donald Trump signed an executive order freezing US foreign aid for 90 days.

Dramatic cuts to various USAID programmes followed, with some exemptions granted for vital humanitarian aid.

The aid freeze has caused shock and dismay at the independent agency created by an act of the US congress in 1961.

Senate Democrats on the committee on foreign relations denounced the move, saying in a statement that the reorganisation “will not only render it impossible for any retained USAID programmes to be implemented, but the burden placed on the state department will cause significant disruption to its core mission”.

“This proposal is illegal, dangerous and inefficient,” they added.

Prior to its closure, the agency managed an annual budget of close to US$43 billion, accounting for more than 40% of the world’s humanitarian aid.

Most of its staff were placed on administrative leave shortly after Trump took office.

USAID staff were informed in a memo today of plans to eliminate all jobs not required by law, according to multiple US media organisations.

In the memo, Jeremy Lewin, the acting head of the independent agency, reportedly said the state department also planned to retire most of USAID’s independent operations in the coming months.