Luke Vargas

Coming up, ICE launches Operation Catch of the Day in Maine, ramping up deportation efforts.

And who best weathered a turbulent year for travel in our annual airline rankings?

Those stories and more after the break.

U.S.

immigration agents are using a new legal tactic to enter people's homes without a warrant signed by a judge.

The change wasn't announced publicly and was detailed in a secret memo over the summer by ICE and Homeland Security lawyers.

According to officials, administrative warrants showing that the government has probable cause to believe someone is in the country illegally serve as enough of a basis to force entry.

For decades, immigration officials haven't had the authority to search a person's home without a judicial warrant on the theory that such a move would violate the immigrants' Fourth Amendment right to protection against unreasonable search and seizure.

A DHS spokeswoman said people targeted under the new policy have, quote, had a full due process and a final order of removal from an immigration judge.

Immigration judges are Justice Department employees who must follow the orders of political appointees.

At the same time, ICE is ramping up operations in Maine, setting up a familiar dynamic, pitting Democratic elected officials against federal agents.

Portland Mayor Mark Dion described ICE's activity as unpredictable and a threat to families, while the agency's Deputy Assistant Director Patricia Hyde turned the tables on Fox & Friends.

Maine has some of the lowest numbers of undocumented immigrants, but has seen an influx of migrants in recent years and is home to significant numbers of African refugees.

We are exclusively reporting that the Trump administration is targeting regime change in Cuba by the end of the year, emboldened by the U.S.

operation to remove Venezuelan President Nicolás Maduro.

Officials don't have a concrete plan to end the communist government that's withstood U.S.

pressure and held onto power on the island for almost seven decades.

But a U.S.

official said the administration is searching for Cuban government insiders who can help to cut a deal to push out the leadership.

According to people familiar with the matter, the administration believes that Cuba's economy is now on the brink of collapse after losing the support of Venezuela.