Sen. Rick Scott announced a challenge to Sen. Mitch McConnell for the top Republican leadership job in the Senate during a meeting of the GOP members on Tuesday.
A spokesman for Scott, of Florida, confirmed the announcement.
The Kentucky Republican has held the leadership position since 2007, making him the longest-serving GOP leader in Senate history.
Get Tri-state area news and weather forecasts to your inbox. Sign up for NBC New York newsletters.
For more on this story, go to NBC News.