President Donald Trump has promised swift action on immigration, asylum and border security as he takes office today.

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.

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

“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.

President Donald Trump signed executive orders declaring a national emergency at the border and reinstating the "Remain in Mexico" policy, among other immigration-related actions.

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.