Mark White | KERA News

Mark White

Bob Daemmrich for The Texas Tribune

Mark White, a Democrat who served as the governor of Texas from 1983 to 1987, has died at the age of 77.

Former Gov. Mark White has testified that voter registration restrictions approved by the 2011 Legislature are unnecessary and make it tougher to register voters.

White took the stand Tuesday in federal court in Galveston on the final day of a hearing challenging the new provisions. Democrat White, before becoming governor, was secretary of state in the 1970s and helped overhaul the state's election code.

Assistant Attorney General Kathlyn Wilson argued the updated rules are meant to prevent fraud.