Democrats break GOP supermajority in Iowa Senate by flipping Republican seat in special election

Catelin Drey's win gives her party an additional seat, bringing the number of Democrats in the upper chamber to 17 and breaking Republicans' two-thirds supermajority.

In a surprising political upset that could signal shifting voter sentiment, Iowa Democrats broke the Republican supermajority in the state Senate on Tuesday night after flipping a traditionally conservative seat in a closely watched special election.

Catelin Drey, a Democrat and first-time candidate, won the Sioux City–area Senate District race with 55% …