The Trump administration on Sunday doubled down on its threat to shut down the southern border with Mexico, a day after it cut aid to Central American countries which President Donald Trump blasted for deliberately sending migrants to the United States.
Faced with a surge of asylum seekers from Central American countries who travel through Mexico, Trump said on Friday there was a "good likelihood" he would close the border this coming week if Mexico does not stop unauthorized immigrants from reaching the United States.
He also accused the nations of having "set up" migrant caravans and sent them north.
Speaking to ABC's "This Week" show, White House acting Chief of Staff Mick Mulvaney said the president had few other options in the absence of any support from Democrats for more border security or legislative action to change the immigration law.
"Faced with those limitations, the president will do everything he can. If closing the ports of entry means that, that's exactly what he intends to do," Mulvaney said. "We need border security and we're going to do the best we can with what we have," he added.
White House adviser Kellyanne Conway told "Fox News Sunday" that the situation at the border was at "melting point" and said the president was serious in his threat. "It certainly is not a bluff. You can take the president seriously."
Neither Trump aide offered any specific details or timeline for the potential border shutdown.
At a Saturday rally on the border in El Paso, Texas, Democratic presidential hopeful Beto O'Rourke denounced Trump's immigration policies as the politics of "fear and division."
Trump has repeatedly said he would close the US border with Mexico during his two years in office. His latest threat had workers and students who frequently cross the border worried about the potential disruption to their lives.
The government says it is struggling to deal with a surge in recent days of asylum seekers from countries in Central America who travel through Mexico and on Saturday cut aid to El Salvador, Guatemala and Honduras.
March is on track for 100,000 border apprehensions, Department of Homeland Security officials said, which would be the highest monthly number in more than a decade. Most of those people can remain in the United States while their asylum claims are processed, which can take years because of ballooning immigration court backlogs.