Department of Homeland Security (DHS) Secretary Kirstjen Nielsen said Sunday that President Trump is considering “every possible action” to prevent a caravan of Central American migrants journeying toward the U.S. from entering the country illegally.

“My general message to this caravan is do not come,” Nielsen said iin an interview on “Fox News Sunday.” “You will not be allowed in. There is a right way to emigrate to this country and this is not it.”

Nielsen did not rule out the possibility that Trump would issue an executive order blocking Central Americans from claiming asylum in the U.S., and stressed that the administration would not permit individuals to enter the country illegally.

{mosads}”I think what the president is making clear is every possible action, authority, executive program is on the table to ensure it is clear that there is a right and legal way to come into this country, and no other ways will be tolerated,” she added.

.@SecNielsen on #Caravan: “This caravan is not getting in. There is a legal way to enter this country. Those who choose to enter illegally will be stopped…My general message to this caravan is: ‘Do not come. You will not be allowed in.'” pic.twitter.com/mdxoWo0L9V

— FoxNewsSunday (@FoxNewsSunday) October 28, 2018

The Trump administration is reportedly weighing an executive order that could block Central Americans from claiming asylum once they reach the U.S. border. The president would issue the order using the same authority he cited when declaring a travel ban on several majority Muslim countries.

While a White House official recently cautioned nothing has been decided, they also acknowledged the administration is “considering a wide range” of potential legal options.

An executive order to bar a group of people from claiming asylum would likely draw immediate legal challenges.

Thousands of Central Americans have been trekking toward the U.S. in recent weeks as they flee violence and poverty in their home countries. The group has become a focus for Trump and Republicans with less than two weeks left until the midterm elections.

The president has painted the group as an imminent threat to the U.S. border, and suggested without evidence that Democrats may be funding the caravan.