A co-author of San Francisco's successful ballot measure opposing military recruiters on public high schools and college campuses has announced he might run as a Green Party candidate against U.S. Sen. Dianne Feinstein, D-Calif. Activist Todd Chretien, 36, of San Francisco has formed an exploratory committee and expects to announce a final decision in the next 10 days. In a news release, Chretien said he wants to make the election a referendum on the war in Iraq, forcing Feinstein to come to grips with polls showing a majority of California voters oppose the war. "The Republican Party may be afraid...