The Department of Homeland Security moved quickly to implement a slew of President Donald Trump's immigration initiatives.

U.S. President Donald Trump on Monday signed executive orders declaring illegal immigration at the U.S.-Mexico border a national emergency, designating criminal cartels as terrorist organizations, and targeting automatic citizenship for U.

The orders include declaring a national emergency to deploy military personnel to the border, suspending refugee resettlement and ending birthright citizenship.

State and local leaders across the country are bracing for a tidal wave of aggressive immigration policies and possible mass deportations that President Donald Trump has vowed to enact in the hours and days following his inauguration Monday.

Newly sworn-in U.S. President Donald Trump said on Monday that he would declare illegal immigration a national emergency, send troops to the U.S.-Mexico border, and reinstate his "remain in Mexico" policy as part of a sweeping immigration crackdown.

“Today, I will sign a series of historic executive orders. With these actions, we will begin the complete restoration of America, and the revolution of common sense,” said Trump, who at midday Monday became only the second U.S. president to serve nonconsecutive terms, after Grover Cleveland in the late 1800s.

Trump is declaring a national border emergency and taking other steps to curb immigration. Here's what that means.

By Ted Hesson, Alexandra Ulmer WASHINGTON/PIEDRAS NEGRAS, Mexico (Reuters) -Newly sworn-in U.S. President Donald Trump said on Monday he will declare illegal immigration at the U.S.-Mexico border a national emergency,

The White House signaled plans for executive orders, including ending birthright citizenship for children of illegal immigrants.

From one order tackling the definition of birthright citizenship, to another declaring illegal immigration at the border a national emergency, Trump swiftly made moves on his promises to tighten the US-Mexico border.