(NewsNation) — Republican leaders in the House are having an ongoing discussion about possibly changing the requirements for removing the speaker from power, a source confirmed to NewsNation on Thursday.

The discussions involve making it so one person alone could no longer trigger a vote to oust a speaker. At this point, such a change is just being floated preliminarily, and no final decisions have been made yet, the source said to NewsNation.

The discussions come as House Speaker Mike Johnson’s position is under threat by Reps. Marjorie Taylor Greene, R-Ga. and Thomas Massie, R-La. Both want Johnson to back down on funding for Ukraine.

A motion to vacate resolution, as it’s known, was filed by Greene last month, the Associated Press reported, and Massie told colleagues he will co-sponsor the effort.

Johnson’s predecessor, former Rep. Kevin McCarthy, R-Calif., was voted of the speakership last year after an effort orchestrated by Republican Rep. Matt Gaetz of Florida.

The Associated Press contributed to this report.

This story is developing. Refresh for updates.