House Republicans have debuted key border security legislation to put an end to the crisis at the U.S.-Mexico border as the mass migration phenomenon rolls into year three.

On Monday, House Homeland Security Chairman Mark Green (R-TN) and GOP committee members introduced the Border Reinforcement Act of 2023, a proposal for which Republicans spent two years hammering out the details, particularly in the last three months of meetings with federal law enforcement and nongovernmental organizations during trips to the U.S.-Mexico border and hearings in Washington.

BEHIND THE SCENES OF AMERICA'S FENTANYL SEIZURE EPICENTER

“Following over five million illegal encounters at our Southwest border, a worsening crisis at our Northern and Maritime borders, and the record number of lives lost to fentanyl poisoning across the country, it is clear this administration does not have the operational control it claims," Green said in a statement.

"Today, this Committee introduced real border security solutions crafted with the insight of those who pay the cost of this crisis every day: frontline Border Patrol agents, their families, local business owners, state and local law enforcement, as well as farmers and ranchers," Green said.

Three committee aides with firsthand knowledge of the bill said this border bill is meant to complement the House Judiciary Committee’s recently passed Border Security and Enforcement Act, not to compete with it.

Each bill had to go through separate committees, according to a committee aide, because judiciary has jurisdiction over immigration laws and homeland security handles border security matters.

However, the two bills will be combined into one package once the border security legislation is marked up and passed by the homeland security panel.

Republicans are looking to move at an expeditious pace. Homeland Security will mark up the bill Wednesday, which could go late into the night if Democrats on the committee put forward as many amendments as they did during last week's judiciary markup.

The homeland security proposal was borne out of the American Security Task Force’s work. Former New York GOP Rep. John Katko, then the ranking member of homeland security, convened the task force in 2021 to begin working on border policy reforms that the House GOP could agree on and therefore be ready to move on if the party won back the majority in November 2022.

Last July, the task force, comprising primarily border lawmakers, announced a framework for a bill they believed could win full party support.

"We're going to be very aggressive, and I think the administration will have some choices to make," Katko said at the time.

The homeland security bill largely follows that proposal and would reinstate mandates for physical barriers, infrastructure, and technology on the 2,000-mile southern border. Although the Trump administration funded 800 miles of border wall projects, it completed just over 450 miles.

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Additionally, the bill seeks to bolster Customs and Border Protection staffing levels, modernize and enhance technology, demand transparency from the Department of Homeland Security, address Border Patrol retention, support local law enforcement's assistance at the border, and rein in CBP's use of humanitarian parole.

A full breakdown of the bill, as previewed to the Washington Examiner last week, can be found here.