On his first day in office, President Trump shut down the CBP One mobile application that facilitated the legal entry of migrants into the U.S. at certain ports of entry. Why it matters: Thousands of people are left stranded in Mexico,

The CBP One app has been highly popular, functioning as an online lottery system that grants appointments to 1,450 people daily at eight border crossings. These individuals enter the U.S. under immigration "parole," a presidential authority that Joe Biden has exercised more frequently than any other president since its creation in 1952.

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.

CBP One — the government-run app for asylum seekers at the border — has been abruptly shuttered after a series of executive orders signed by President Donald Trump.

About 200 migrants who had their CBP One immigration appointments canceled when President Trump was sworn into office are refusing to leave the San Ysidro border checkpoint until they are seen.

The Trump administration Monday ended use of a border app called CBP One that has allowed nearly 1 million people to legally enter the United States with eligibility to work.

SAN DIEGO — Migrants waiting to enter the US using former Joe Biden’s CBP One app broke down in tears after their appointments were canceled the moment President Trump took office Monday – just the first of the sweeping border actions the new administration prepared for the first day.

Just hours after the inauguration, migrants with CBP One appointments along the U.S.-Mexico border learned that all CBP One appointments were canceled.

Several migrants said they had recently arrived in Ciudad Juarez, Mexico after weeks of travel, only to find their CBP One appointments were cancelled.

Hours after Trump’s inauguration, his administration canceled appointments allowing migrants to enter the U.S. to request asylum, leaving many of them stranded on the U.S.-Mexico border.

The termination of the CBP One app on Monday has left thousands of migrants stranded and uncertain about their futures.