Last week, the lawyers used footage from Tam's taped deposition to buttress their contention that Proposition 8 is unconstitutional because it was fueled by deep-seated animosity against gays. They questioned him about a letter he wrote during the ballot measure's 2008 campaign saying that "other states would fall into Satan's hands" if gays weren't stopped from marrying in California. Before Tam's testimony, lawyers for Proposition 8's sponsors plan to wrap up their cross-examination of Stanford University political scientist Gary M. Segura.

