After two weeks of witnesses called by plaintiffs challenging Proposition 8, the defense’s case finally got under way Monday.

Kenneth Miller, a political science professor at Claremont McKenna College — and one-time lawyer with Morrison & Foerster — testified that gays and lesbians have quite a bit of political power in California. That contention, which the defense had previously hammered on cross-examinations, is central to whether gays deserve federal constitutional protections.