House Speaker Mike Johnson has served in the post for little over a year, but his tenure has been marked with few legislative accomplishments and a series of splits within his conference that stymied his party’s agenda.

The Speaker could lead a conservative overhaul of the government. Or find himself in the political wilderness.

With the presidency and control of Congress at stake, Johnson, who in many ways is an accidental House speaker after taking over after Kevin McCarthy was ejected in a historic far-right revolt, is uniquely positioned to play a central role in both outcomes.