The impending impeachment of Homeland Security Secretary Alejandro Mayorkas marks a historic event, as it would be the first impeachment of a Cabinet official in nearly 150 years.

House Republicans filed articles of impeachment against Mayorkas over his handling of the border crisis, which they blame on the secretary’s ineptitude. The drastic move has no modern precedent — the last impeachment of a Cabinet official was that of War Secretary William Belknap in 1876, who served under President Ulysses S. Grant.