President Trump, in his first days in office, has released a series of executive orders that will reshape the country’s immigration system. We lay out the key changes.

Agents from a handful of federal agencies combined to arrest more than 40 people in the country illegally early Sunday during a raid in Adams County, the local office of the Drug Enforcement Administration said.

It appears the north county has been a target for members of the U.S. Immigration and Customs Enforcement this week. Even before U.S. Rep. Nick Langworthy came to Mayville to voice his support for the Trump administration’s decision to go after criminals who are not citizens living in the United States,

Aurora, Colorado, which had been a focus for President Donald Trump during his campaign, will be the next city where an operation is conducted, sources told NBC News.

Also Tuesday, Colorado Public Radio and CBS4 were among outlets that reported the U.S. military was preparing space at Buckley Space Force Base in Aurora for staging, processing and temporary holding of “criminal aliens” detained in ICE operations, according to a U.S. Northern Command statement.

The Trump administration launched an immigration enforcement blitz nationwide Sunday that included multiple federal agencies and resulted in the arrest of nearly 1,000 people, according to Immigration and Customs Enforcement.

The measure is a response to a new directive from President Donald Trump’s administration that removes immigration enforcement restrictions at schools and other “sensitive places.”

Immigration since President Donald Trump's inauguration has been a hot topic. Here's what has happened, and what you need to know.

On Monday, the Florida Highway Patrol conducted a joint operation with federal immigration officers in Jefferson County to round up 12 people believed to be in the country illegally, one of a number of raids performed around the country as the Trump administration ramps up its plans for mass deportation.

Some of Trump’s actions have taken effect immediately. Others are facing legal challenges or will require additional funding.

In a display of force aimed at increasing arrests and generating publicity, the administration targeted the nation’s largest city, where sanctuary policies limit cooperation with ICE.