1. “Sleeper cells” meaning

In security and intelligence terms, sleeper cells are covert operatives who live normally in a country while secretly waiting for instructions to carry out activities such as espionage or attacks.

Governments sometimes monitor suspected foreign intelligence networks, but public claims about their number or presence are often politically charged.

2. Evidence and verification

As of publicly available reporting, there has not been confirmed evidence of widespread Iranian “sleeper cells” operating across the U.S..

U.S. intelligence agencies have warned about potential activities linked to Islamic Revolutionary Guard Corps and other Iranian networks, but those warnings usually refer to specific plots or individuals, not large numbers of embedded sleeper cells.

3. Political context

Statements like this are often made in the context of U.S. political debate, especially around immigration and national security.

Donald Trump frequently criticizes the immigration and border policies of Joe Biden, arguing they increase security risks.

4. What security agencies typically say

U.S. agencies such as the Federal Bureau of Investigation and Department of Homeland Security usually describe the threat from Iran as targeted plots, cyber operations, or surveillance, rather than large organized sleeper-cell networks inside the country.

✅ Bottom line:
The quote reflects a political claim, not a confirmed intelligence assessment publicly backed by U.S. agencies.

President Trump On Iranian Sleeper cells: 🇺🇸We know where most are. We have our eyes on ALL of them…They came in under sleepy Joe Biden, THE WORST President in the history of our country. pic.twitter.com/05pivJNDc4

— Donald J Trump Posts TruthSocial (@TruthTrumpPost) March 12, 2026