Trump’s latest post on Thursday night went further, pledging to “end all federal benefits and subsidies to noncitizens”.
The president also blamed refugees for causing the “social dysfunction in America” and vowed to remove “anyone who is not a net asset” to the US.
The flurry of announcements come after officials said that the suspect in Washington DC shooting, Rahmanullah Lakanwal, came to the US in 2021 under a programme that offered special immigration protections to Afghans who had worked with US forces in the wake of their withdrawal from Afghanistan.
At the time, the Taliban had taken back control of Afghanistan, raising fears of retribution against those who had co-operated with the US.
Mr Lakanwal once worked alongside the CIA in Afghanistan, the agency’s director John Ratcliffe has said.
An official told the BBC’s US news partner CBS that Mr Lakanwal had applied for asylum in 2024 and that his application had been granted earlier this year.
Trump described the attack as an “act of terror”.
He had already imposed a travel ban on nationals of Afghanistan – and 11 other countries, primarily in Africa and Asia – earlier this year.
A number of majority-Muslim countries also faced a travel ban during Trump’s first presidency.
