In Manitoba, along the longest undefended border in the world, Canadians push back against Trump’s allegations of an “invasion” of migrants and drugs.

A U.S. Border Patrol agent, 44-year-old David Maland, was shot dead in the line of duty Monday afternoon, officials said. Two suspects were also reportedly shot, including one who died.

The Trump administration Monday ended use of a border app called CBP One that has allowed nearly 1 million people to legally enter the United States with eligibility to work. (AP/Greg Bull / Javier Ar

U.S. President Donald Trump on Monday kicked off his sweeping immigration crackdown, tasking the military with aiding border security, issuing a broad ban on asylum and taking steps to restrict citizenship for children born on American soil.

The American Dream has come crashing down for millions and millions of people who line up to get a chance to settle in the United States. Donald Trump has, with one signature, shut the door for them permanently.

Just hours after the inauguration, migrants with CBP One appointments along the U.S.-Mexico border learned that all CBP One appointments were canceled. Dozens of asylum seekers in Matamoros, Mexico, were turned away in near-freezing temperatures.

U.S. border agents have been instructed to summarily deport migrants crossing into the country illegally without allowing them to request legal protection.

Trump orders thousands of active duty troops to the southern border to support CBP crackdown on migrants - The exact number of troops is not immediately clear

The order will deploy 1,500 troops to build physical barriers, but they will not be used for law enforcement, a military official says.

The U.S. president signed directives to militarize the border, consider designating cartels as terrorist groups, and cut foreign aid.