Education advocate Elisabeth Jensen has won the Democratic nomination in Kentucky's 6th Congressional District.
Jensen will challenge first-term Republican U.S. Rep. Andy Barr in the general election.
Jensen, a political newcomer, defeated Geoff Young on Tuesday in the district that covers Lexington and a large swath of central and eastern Kentucky.
She has voiced her support for President Barack Obama's health-care overhaul and criticized Barr for voting for its repeal.
Jensen leads The Race for Education, a non-profit that provides scholarships and focuses on literacy and other education initiatives.
Barr was unopposed in Tuesday's primary, and he enters the general election campaign with a fundraising advantage.
Barr defeated Democratic incumbent Ben Chandler in 2012 to win the congressional seat.
The district has swung back and forth between Republican and Democratic representation.