Hours after being sworn in, President Trump fulfilled his campaign promises to crackdown on illegal immigration. The President declared an emergency at the southern border, and as a result, there have already been many changes to policy.

The troops, part of a unit called the Texas Tactical Border Force, will join those already deployed to the border through Texas' Operation Lone Star.

Texas Gov. Greg Abbott said the additional troops will work alongside federal border agents amid the Trump administration's crackdown on immigrants.

President Donald Trump’s pick to lead the Commerce Department said Mexico and Canada can avoid new tariffs due this weekend if they clamp down on border security — while also signaling that Trump is likely to impose widespread new levies to return manufacturing to US soil.

President Donald Trump's nominee to run the Commerce Department, Howard Lutnick, said on Wednesday that Canada and Mexico can avoid looming U.S. tariffs if they act swiftly to close their borders to fentanyl,

Trump has said he is considering imposing 25% tariffs on both countries by 1 February. He has previously tied the tariffs threat to ending illegal migration and drugs crossing into the US through its southern and northern borders.