Because the intelligence panel is a “select” committee, the speaker has the authority to dictate who can serve, just as Ms. Pelosi was able to block Republicans appointed by Mr. McCarthy from the select committee investigating the Jan. 6 attack.
Removing members from other committees requires a vote on the House floor. Democrats held such a vote in February of 2021 to remove Ms. Greene from the Education and Budget Committees, after social medial posts surfaced from before she was elected in which she endorsed the executions of Democrats and spread bigoted conspiracy theories. They held another vote months later to eject Mr. Gosar from his committees after he posted an animated video that depicted him killing Representative Alexandria Ocasio-Cortez, Democrat of New York.