House Speaker Mike Johnson (R-La.) heads to the House floor on Friday in hopes of being formally reelected Speaker.

While Johnson has the endorsement of President-elect Trump to remain Speaker, one Republican is pledging to oppose him, and several others are not committing to supporting Johnson. That has raised questions about whether he can win enough votes to keep his gavel, given the House GOP’s razor-thin majority.

In short, Johnson can only afford to lose one Republican vote for Speaker — assuming every member is present and voting for a candidate. But the details can get complicated.

The Speaker election is the first order of business for the House on the opening day of the new Congress, which is on Jan. 3 at noon, as dictated by the Constitution.

By practice, the House can conduct no business until it elects a Speaker, meaning the chamber will be paralyzed until it........

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