JACKSON, Miss. (AP) — Mississippi moved quickly toward a legal confrontation over the nation's most restrictive abortion law Monday. Within six hours, the governor signed a bill banning most abortions after 15 weeks of gestation, the state's lone abortion clinic sued, and a federal judge set a Tuesday morning hearing to consider blocking the restrictions.Abortion opponents sought the confrontation, hoping federal courts will ultimately prohibit abortions before a fetus is viable. Current federal law blocks such restrictions by states.