Democrats believe making embryonic stem cell research a campaign issue will help them in their effort to gain a majority in the House of Representatives in November’s elections. The Democratic Congressional Campaign Committee has unveiled new advertisements that target seven Republicans who oppose federal funds for stem cell research that results in the destruction of embryos. The Democrats plan to promote the controversial issue with fervor in areas where there are large medical centers or biotechnology companies, the Chicago Tribune reported March 27. They also plan to use the ads in congressional districts known for politically moderate voters but represented...