The state party says Matthew Teter began his new role Tuesday. He'll replace Brian Zuzenak, who is leaving March 31 after a transition period.
Missouri Democrats have undergone a leadership change after losses in the 2010 elections. Former State Auditor Susan Montee took over as chairwoman of the party in December, replacing Craig Hosmer. Montee also is an ally of McCaskill.
Missouri is lagging in its use of federal stimulus money intended to make homes more energy efficient for low-income residents.
Missouri received nearly $129 million in home weatherization funds for low-income residents under the 2009 federal stimulus bill. As of the end of January, just $47 million of that had been spent. That amounts to 37 percent of the total.
Updated 3:29 p.m. March 15, 2011 with information from committee meeting.
A Missouri House committee has opted not to try to increase funding for school busing and the state's A+ scholarship program.
Some lawmakers had distributed amendments Tuesday that would have provided about $35 million of additional money for public school transportation. But the committee did not vote on any of those amendments Tuesday.