MC EXPLAINER What triggered Trump’s ‘permanent pause’ threat and what it means for Third World migrants

A deadly D.C. ambush by an Afghan migrant has become Trump’s Exhibit A to rip up Biden-era refugee admissions and vow a sweeping halt to 'Third World' migration.

Two young US soldiers were walking a patrol beat near the White House on Wednesday when an Afghan gunman opened fire. By the next day, one was dead, the other is still fighting for life, and the attack had been turned, almost in real time, into the launchpad for one of the most sweeping anti-immigration threats of Donald Trump’s second term.

The suspect is not a border crosser in the way Trump usually describes. He is Rahmanullah Lakanwal, a 29-year-old Afghan who once worked with a CIA-backed 'Zero Unit' in Afghanistan, then reached the US under Operation Allies Welcome, the evacuation and resettlement programme for Afghan partners launched after Kabul fell in 2021.

The emotional raw material is obvious: a soldier killed almost in the shadow of the White House by an immigrant who came in through a Biden-era resettlement programme.

Trump immediately labelled the attack an 'act of terror', blamed 'lax' vetting under Biden, and ordered more National Guard deployments to Washington, even though a court has already questioned the legality of using troops for routine policing in the capital.

The policy chain reaction came next.

The first domino: Afghan freeze and green-card reviews

In the hours and days after the shooting, three big moves landed.

1. Afghan immigration frozen

The US Citizenship and Immigration Services (USCIS) announced it had stopped processing all immigration requests related to Afghan nationals 'indefinitely', citing the DC shooting and long-standing concerns about vetting gaps in Operation Allies Welcome.

2. Green cards from 19 countries under review

US Citizenship and Immigration Services (USCIS) chief Joe Edlow said he had ordered a 'full scale, rigorous re-examination of every Green Card for every alien from every country of concern' at Trump’s direction.

Those 19 'countries of concern,' listed in an earlier Trump proclamation and now recirculating in news coverage, include Afghanistan, Iran, Somalia, Haiti, Libya, Yemen, Myanmar, Cuba, Venezuela and several African states.

3. Biden-era asylum and refugee cases to be re-checked

DHS officials have also said the administration is reviewing all asylum cases approved under President Biden, alongside a separate plan to re-interview large numbers of refugees admitted between 2021 and 2025, effectively putting many on hold for green cards until they pass a second round of scrutiny.

Together, these steps turn a single case in Washington, DC into a wider verdict on almost the entire Biden-era approach to migration and protection.

What Trump actually promised: ‘permanent pause’ and ‘reverse migration’

On Truth Social and on the X, Trump has claimed that US technological progress has been 'eroded' by immigration and laid out a set of promises that go well beyond border control:

• “Permanently pause migration from all Third World Countries” to let the system “fully recover”.
• “Terminate all of the millions of Biden illegal admissions, including those signed by Sleepy Joe Biden’s Autopen,” implying, without evidence, that some decisions were improperly rubber-stamped.
• End all federal benefits and subsidies for non-citizens.
• “Denaturalise migrants who undermine domestic tranquillity.”
• Deport any foreign national who is a “public charge, security risk, or incompatible with Western Civilisation.”

He summed it up with a slogan: “Only REVERSE MIGRATION can fully cure this situation… You won’t be here for long!”

He did not define which countries count as 'Third World', or explain how a 'permanent' pause would work in law. But politically, the link is clear: the DC ambush is now the central narrative hook for demands to stop and even reverse non-Western migration.

Who’s in the firing line, and why it matters beyond America

Though Trump never spelled out which states he considers 'Third World,' but in political usage, it almost always maps onto poorer, mostly non-Western countries in Africa, Asia and Latin America, the same places that send refugees, low-income workers, but also millions of students and high-skilled professionals.

However, immediately, the most exposed groups are:

• Afghan evacuees and asylum-seekers, whose files are now frozen or under review.
• Green-card holders and applicants from the 19 'countries of concern', who now face the possibility that old approvals will be reopened.
• Refugees and asylum seekers admitted under Biden, whose status could be questioned years after arrival.

But the rhetoric, 'reverse migration', 'Western Civilisation', 'Third World countries,' lands much wider. Students, tech workers, H-1B aspirants, and family migrants from India and the broader Global South may not be the first targets of a ban, but they live inside a climate where 'reverse migration' is an openly stated goal.