Rep.-elect Tom Suozzi (D-NY) will be sworn into the House of Representatives this week, giving Democrats an additional seat in the lower chamber and further narrowing Republicans’ slim majority for the remainder of the year.

Suozzi will be sworn in by Speaker Mike Johnson (R-LA) on Wednesday evening, bringing the total number of lawmakers back to 432, made up of 219 Republicans and 213 Democrats. Three vacancies remain that are set to be filled in the coming weeks.