House Speaker Paul Ryan will not run for re-election this fall, throwing another wrench into Republican efforts to hold a House majority in November.

The GOP faces a tough fight to keep the House in this year's midterms amid Democratic enthusiasm and opposition to some policies pushed by President Donald Trump and the Republican-controlled Congress. The speaker's move raises the prospect that more GOP lawmakers could decide not to run for re-election.

At a Wednesday morning news conference, Ryan said he retired so he could see more of his teenage children. He also said the prospect of Democrats winning the House had no effect "whatsoever" on his move to retire.

"Today, I am announcing that this year is my last one as a member of the House. ... I will be retiring in January, leaving this majority in good hands with what I believe is a very bright future," he said.

In a statement announcing Ryan's decision earlier, advisor Brendan Buck said Ryan told colleagues Wednesday that he will serve out his full term and leave office in January. The congressman "is ready to devote more of his time to being a husband and a father," Buck said.

Ryan achieved his long-held goal of overhauling the U.S. tax code in December. Once he did so, he felt comfortable leaving a job that had become taxing due to Trump's behavior, according to the Axios report.