Republican Who Oversaw Mayorkas Impeachment Will Not Seek Re-election

Representative Mark Green, the chairman of the Homeland Security Committee, announced on Wednesday that he would not run for re-election, just a day after the Tennessee Republican oversaw the impeachment of Alejandro N. Mayorkas, the homeland security secretary.

Mr. Green, a deeply conservative former Army Ranger medic who was elected in 2018, said that he had accomplished what he had come to Washington to do.

“At the start of the 118th Congress, I promised my constituents to pass legislation to secure our borders and to hold Secretary Mayorkas accountable,” Mr. Green said in a statement. “Today, with the House having passed H.R. 2 and Secretary Mayorkas impeached, it is time for me to return home.”

Mr. Green, 59, is the third committee chairman who would have been eligible to lead their panel next year to say they will leave Congress at the end of the year. Also this week, Representatives Cathy McMorris Rodgers of Washington, 54, the chairwoman of the Energy and Commerce Committee, and Mike Gallagher of Wisconsin, 39, who heads the select committee on China, announced they would not run for re-election.

Taken together, they are striking decisions for relatively young members of Congress who won the gavels of powerful committees — coveted positions that lawmakers often wait years to receive — only a year ago.

“This place is so broken, and making a difference here is just — you know, just it feels like a lot of something for nothing,” Mr. Green said in an interview with Axios.