The app has come under scrutiny in the past from Republicans, with some stating it has been used to hide illegal immigration.

On Monday, appointments were canceled for people looking to cross the U.S. border just minutes after President Donald Trump took his oath of office.

Mr. Trump is planning to attempt to deny birthright citizenship to the children of immigrants who are in the U.S. illegally, according to the incoming officials. The U.S. government has long interpreted the U.S. Constitution to mean that those born on American soil are citizens at birth, regardless of their parents' immigration status.

President Trump on Monday signed an executive order ending birthright citizenship for children of illegal immigrants, likely setting off a legal battle in the courts.

Migrants who waited months to cross the U.S. border with Mexico learned their CBP One appointments had been canceled moments after Donald Trump was sworn in as president.

President Donald Trump’s plans to curb immigration and beef up border security began taking effect soon after he was inaugurated Monday as he made good on campaign promises.

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

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

President Donald Trump began his term by taking a series of sweeping immigration executive actions Monday that included declaring a national emergency at the US southern border, immediately ending use of a border app called CBP One that had allowed migrants to legally enter the United States,

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

Border Patrol agents were given the edict by the Trump administration on President Trump’s first full day in office Tuesday. It represents a seismic shift from the “catch-and-release” open border days of the Biden administration, during which around 8 million illegal immigrants flooded into the country.