Trump: Iranian Sleeper Cells May Be Inside America After Biden Border Failures

President Donald Trump revealed on March 11, 2026, that he has been briefed on the presence of suspected Iranian “sleeper cells” operating inside the United States, raising new alarms about national security amid escalating tensions with Tehran.

Speaking to reporters after a question from Fox News correspondent Peter Doocy, Trump confirmed that intelligence officials have warned him about potential Iranian operatives in the country.

“I have been [briefed], and a lot of people came in through Biden with his stupid open border,” Trump said. “But we know where most of them are. We’ve got our eye on all of them, I think.”

Trump directly tied the threat to the immigration policies of the Biden administration, arguing that years of weak border enforcement allowed dangerous individuals to slip into the country undetected.

The warning comes as the United States and Israel continue major military operations targeting Iran’s military and nuclear infrastructure. Intelligence officials have raised concerns that Iran could attempt retaliation through covert operations inside the United States.

Reports from Fox News and other outlets have also pointed to FBI warnings about potential Iranian drone attacks that could be launched from vessels off the U.S. West Coast, possibly targeting locations in California.

Trump described the current campaign against Iran as being conducted “at a level that nobody has seen before,” emphasizing the seriousness of the ongoing conflict.

Supporters of the president say the warning underscores the national security risks created by years of unchecked migration across the southern border.

Republican lawmakers have long argued that the Biden administration’s policies effectively created an “open border,” allowing millions of migrants to enter the United States while overwhelming federal immigration authorities.

Critics of those policies say that while many migrants are seeking asylum, the chaos at the border also creates opportunities for hostile foreign actors to enter the country.

Trump’s remarks have also sparked discussion across social media, with supporters pointing to the comments as further evidence that the United States must dramatically strengthen border enforcement.

While intelligence agencies have not publicly disclosed the number of suspected operatives or their locations, Trump suggested authorities are closely monitoring those believed to be involved.

The concerns extend beyond the United States. Similar warnings have been raised in Canada, where some lawmakers have accused their government of allowing individuals linked to Iran’s regime to operate freely.

Trump framed the issue as part of a broader national security challenge, arguing that weak border policies can have consequences far beyond immigration.

“The border is national security,” Trump has repeatedly said during his presidency and political campaigns.