Elizabeth MacDonough (born February 16, 1966) is an American lawyer and the Parliamentarian of the United States Senate since 2012. She is the first woman to hold the position. MacDonough guided the Senate through the first and second impeachment trials of Donald Trump.

Incumbent parliamentarian Elizabeth MacDonough has held the office since 2012, appointed by then-Senate majority leader Harry Reid.

The Republican Party, also known as the Grand Old Party (GOP), is a right-wing political party in the United States. One of the two major parties, it emerged as the main rival of the then-dominant Democratic Party in the 1850s, and the two parties have dominated American politics since then.