The administration is looking at ways to crack down on border crossings as a means to rally his political base ahead of the midterm elections, specifically taking aim at the controversial migrant caravan that left Honduras on October 12th.

Reportedly still more than 1,000 miles from the U.S. border, the caravan’s exact numbers are unknown amidst conflicting accounts. The Mexican government estimates the number of people taking part in the caravan has fallen below 4,000, while United Nations officials assisting Mexican authorities said Monday that more than 7,200 people had participated. Alex Mensing, a U.S.-based organizer with the humanitarian group Pueblo Sin Fronteras claimed the size of the caravan has swelled to 10,000.

Officials said they are considering all options for sealing the border, including denial of Central American asylum applications based on the so-called “travel ban” of 2017, which a deeply divided U.S. Supreme Court upheld as a legitimate use of executive authority. No final decisions have been made, they said, citing legal challenges as a barrier to some of the more aggressive methods.

“The administration is considering a wide range of administrative, legal and legislative options to address the Democrat-created crisis of mass illegal immigration,” a White House official explained. “No decisions have been made at this time. Nor will we forecast to smugglers or caravans what precise strategies will or will not be deployed.”

The details are expected to be finalized by early next week in a speech by the president. In the meantime, the Pentagon is preparing to deploy at least 800 troops to the border to confront the caravan.

Department of Homeland Security Department Secretary Kirstjen Nielsen said Thursday night, “If [the migrants] come here illegally with no legitimate reason to stay, they absolutely will be apprehended and removed immediately,” she said. “To ignore, basically, refuge and continue, in some cases, to come to the United States raises questions of what their real motives are.”

Human Rights First, a non-profit and non-partisan rights group, spoke out against this proposed regulation, saying President Trump is “misinterpreting the law.”

“The fact that the president can apply it to asylum is where we say no,” said Jennifer Quigley, an advocacy strategist for refugee protections with Human Rights First, a non-profit and non-partisan rights group. She explained that such a move from the Trump administration would be a violation of the U.S. Constitution’s due process clause and obligations under international law, such as the Refugee Convention.

Marielena Hincapie, executive director of the National Immigration Law Center agreed that closing the border would do more harm than good. “This is going to impact a large range of people coming through who may or may not be part of the caravan, other people who are seeking asylum, or other forms of visas,” she said. “A lot of people are simply coming over to do business.”

Joshua Smalley is a New York-based writer, editor, and playwright. Find Josh at his website and on Twitter: @smalleywrites.