Catelin Drey's win gives her party an additional seat, bringing the number of Democrats serving in the upper chamber to 17 and breaking Republicans' two-thirds supermajority.
Iowa Democrats scored a significant victory Tuesday by flipping a Republican seat in a special election and breaking the GOP supermajority in the state Senate.
Catelin Drey won the Sioux City-area district with 55% of the vote to Republican opponent ... [1191 chars]