Rep. Mark Green (R-Tenn.) has resigned from the House amid a tight margin between parties in the lower chamber.

“It’s with a heavy heart that I say farewell. To my constituents across Tennessee’s 7th District—thank you. The trust you put in me is humbling. I will look back fondly on my years of serving as your voice in Washington,” Green, who started in the House in 2019, said in a post on the social platform X earlier this month.

There are now 219 Republicans and 212 Democrats in the lower chamber, only a seven-seat difference amid already high tensions between the two parties and the 2026 midterm races in which Democrats seek to take back the House, beginning to heat up.

President Trump’s base has also recently been rattled by controversy over files related to convicted sex offender Jeffrey Epstein, creating some strain between Republican lawmakers and the president.

Close to three-quarters of Democratic voters were feeling motivated to vote in the next election cycle in a recent CNN poll.

Seventy-two percent of Democrats and Democratic-leaning voters in the poll were “extremely motivated” to vote before next year’s midterms, with 50 percent of Republicans and Republican-leaning voters saying the same.

Republicans are also tight in the Senate, with 53 seats to Democrats’ 45 seats and two independent senators.