BOSTON, Feb. 9 - Setting up a political battle over stem cell research, Gov. Mitt Romney of Massachusetts said this week that he would propose legislation to outlaw a type of embryonic stem cell research that is being planned by laboratories at Harvard University and other institutions in the state. The governor's remarks came as Democratic lawmakers were introducing legislation that would promote embryonic stem cell research, partly in an effort to keep the state's large stable of research scientists and biotechnology companies from moving to California or other states that are providing support or financial incentives for such research....