Critics of Marjorie Taylor Greene have reacted with despair after the Republican briefly presided over the House as a replacement for House Speaker Kevin McCarthy. On Monday, the Georgia congresswoman acted in the role of speaker pro tempore. This is a temporary and frequently rotated position that sees representatives perform certain duties of the House speaker when they are not available to attend a session of the floor. While the position of speaker pro tempore is largely insignificant, and can be carried out by any majority party member of the House, it is the latest sign that Greene is moving...