Colorado Democrat Andrew Romanoff, a former state House Speaker, has made official his 2010 primary challenge of Sen. Michael Bennet.

Romanoff planned announcements Wednesday in Pueblo, Colorado Springs and Denver. His campaign Web site was updated Wednesday to include a statement from Romanoff on the reasons he’s seeking the Senate seat.

“I’m running for the Senate because I want to represent the state I love the best way I know how,” Romanoff said. “I’ve led the fight to energize our economy, strengthen our schools, and curb the cost of health care. No one in this race knows the people of Colorado better – and no one will work harder to make their voices heard.”