Overview

• Decision Desk HQ and multiple outlets reported Democrat Catelin Drey defeated Republican Christopher Prosch to win Iowa’s District 1 seat left vacant by the June death of Sen. Rocky De Witt.
• Unofficial results show Drey leading roughly 55% to 44%, shifting the chamber to 33 Republicans and 17 Democrats and removing the GOP’s ability to approve nominees on a party-line vote.
• The flip came in a district Trump carried by double digits in 2024, extending Democrats’ 2025 special-election overperformance after earlier gains in Iowa and Pennsylvania.
• The Democratic National Committee backed Drey with a large get-out-the-vote push, touting 30,000 volunteers and extensive canvassing, texting and phone banking.
• Separately, Georgia’s 21st District race produced no majority winner and is headed to a runoff next month, with Democrat Debra Shigley likely advancing against a Republican opponent.