U.S. Secretary of State Clinton arrived in Tunisia after a visit to Egypt, which is holding a national referendum on constitutional changes later this week. On Wednesday, Clinton toured Cairo’s Tahrir Square, the focal point of the uprising against U.S.-backed President Hosni Mubarak. Just hours before, a major youth coalition declined to meet with Clinton in protest of longstanding U.S. support for Mubarak right until the last days of his regime. Clinton, meanwhile, has announced she will not stay on in President Obama’s cabinet in any position if Obama is re-elected next year.