BBC News:- US President Donald Trump has formally launched his re-election campaign, after threatening to unleash a wave of mass deportations next week.
He tweeted that authorities will start “removing the millions of illegal aliens who have illicitly found their way into the United States”.
The Republican president made his case for a second term before thousands of supporters at a rally in Florida.
Early polls place Mr Trump behind some potential Democratic challengers.
“Going to be wild – See you later!” tweeted the president earlier on Tuesday, hours before he took to the stage in Orlando.
Mr Trump tweeted on Monday night that undocumented migrants in the US would be “removed as fast as they come in”.
US Immigrations and Customs Enforcement (ICE) typically does not announce raids, and the agency’s officials told US media they had been unaware the president would tweet about the plans.
Earlier this month, acting ICE Director Mark Morgan said authorities would target migrants who have received final orders of deportation, including families.
In his Monday night tweets, Mr Trump also contrasted Mexico’s “strong immigration laws” – the product of a new agreement to avert US tariffs – with US Democratic border policies.
As a part of the deal, Mexico is deploying 6,000 National Guard personnel to its borders to crack down on Central American migration.
A senior Mexican official told the Associated Press news agency the number of migrants arriving at the US border had already dropped from 4,200 to 2,600 per day.