A major campaign against certain stem cell research in Missouri is planned for this weekend. Roman Catholic priests across the state will distribute to worshippers 700,000 cards calling on the State Legislature to ban some forms of stem-cell research. Once the cards are signed, they will be collected and sent to lawmakers at the State Capitol. A bill stalled in the Legislature would ban a process called somatic cell nuclear transfer or therapeutic-cloning technology. Even if the bill makes it through the Legislature, it faces a possible veto from Governor Matt Blunt. Many social conservatives favor a ban, saying the research violates pro-life principles. Blunt has argued the process doesn’t create life.