Former Missouri state Treasurer Sarah Steelman (R) has announced she won't run for anything in 2010.

The treasurer was expected early on to run for Senate in a primary against Rep. Roy Blunt (R-Mo.). But after opening an exploratory committee, she backed off that race and started looking at running for Blunt's open House seat.

Now she's doing neither.

From the St. Louis Beacon:

Steelman, of Rolla,  said in a statement that she has "unfinished work'' at home, raising her youngest son with her husband. David Steelman, a prominent lawyer and fellow former legislator. 

 "Michael is 14 and I want to raise him here in Missouri –in the heart of this country, not in Washington D.C.,'' she said, noting that her two oldest sons are in college.

Sarah Steelman had made an unsuccessful bid for governor in 2008, losing in the GOP primary to then-U.S. Rep. Kenny Hulshof, who was defeated last November by the Democrat, now-Gov. Jay Nixon, who then was attorney general.

In her statement, she acknowledged what many political activists suspected:

"For months I have considered running for the U. S. Senate and I have been honored and gratified by people throughout the state and country who have encouraged me to run," she said. "I loved serving the people of Missouri as State Treasurer and a State Senator, and I struggled with my decision because I know there is much work that needs to be done, or undone, in Washington."