[JURIST] Kansas voters will go to the polls Tuesday to decide whether to approve a constitutional amendment prohibiting gay marriage. Kansas law already prohibits gay marriage but supporters claim the ban must be put into the Kansas Constitution [text] to avoid any legal challenges. The chief argument in favor of placing the ban in the Kansas constitution is the recent decision by a San Francisco judge who ruled California's ban of gay marriage violates California's constitution [JURIST story]. If the ban is approved, Kansas would become the 18th state with a prohibition of gay marriage in its constitution. Amendment opponents [Kansans for Fairness advocacy website] claim the new measure is oppressive. Voters are expected to approve the ban overwhelmingly. The Wichita Eagle has local coverage. Read the text of the proposed amendment. AP has more.