An immigration threat - revived by the White House.
President Trump on Friday said mass deportation roundups will begin "fairly soon." On Monday, he said the action would happen sometime after the July Fourth holiday.
He's made such threats before.
Raids planned for last month were postponed after details were leaked.
Trump's hardline approach to immigration is a major focal point in his presidency and his 2020 re-election bid.
"Well I don't call them raids.
I say they came in illegally.
And we're bringing them out legally.
These are people where we have the papers, we've gone through the court system.
They'll be starting fairly soon.
But, I don't call them raids.
We're removing people that have come in, all of these people over the years, that have come in illegally.
We are removing them and bringing them back to their country." In a statement, U.S. Immigration and Customs Enforcement or ICE, said its focus was arresting people with criminal histories but any immigrant found in violation of U.S. laws should expect to be caught up in the sweep.
Migrant advocates are gearing up for a fight, vowing to defend their communities when ICE officers arrive.
Government documents published this week by migrant rights groups showed that in the past ICE operations swept up more than just those with criminal histories.
The threatened raids come after captures at the southwest border eased in June after spiking to a 13-year high in May.
Just this week, the Inspector General for the Department of Homeland Security released photos taken last month at detention centers, which show severe overcrowding as well as women and children sleeping on the floor.
There's been growing criticism and accusations of inhumane living conditions at the facilities.
Trump says if migrants don't like the conditions - they should stay home.