INDIANAPOLIS | Glenda Ritz is expected to announce Thursday she is running for Indiana governor.

The first-term state superintendent of public instruction has scheduled a "special campaign announcement" for 10 a.m. region time at an Indianapolis high school, followed by similar events across the state including at 2:15 p.m. region time Friday at Hammond's Harding Elementary.

Ritz would be the third Democrat vying to take on Republican Gov. Mike Pence in the 2016 contest. She will have to defeat John Gregg, the former House speaker and 2012 nominee, and state Sen. Karen Tallian, D-Ogden Dunes, to win the nomination.

If elected governor, Ritz would reclaim many of the education powers the state superintendent once held, but lost in the past three years as Pence and the Republican-controlled Legislature sought to diminish the only Democrat holding statewide office.