Research ReportCRS In FocusVersion 5
IF11907
U.S. Senate Vacancies: How Are They Filled?
Published Jul 16, 2024Updated Jun 21, 2025
Full report
What this is
The Congressional Research Service is a nonpartisan policy and legal analysis arm of the Library of Congress. CRS reports are written for members of Congress and their staff, not the public — but they’re made available openly through Congress.gov.