Invoking presidential emergency powers gives the president the ability to go around Congress and unlock federal funding to crack down at the border.

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

WASHINGTON − President Donald Trump on Monday declared a national border emergency and ordered the U.S. armed forces to repel "forms of invasion" at the U.S.-Mexico border, including illegal migration and drug trafficking.

Migrants' claims for US asylum have been blown into disarray by Trump's sweeping executive orders on the border.