Ortega poised to retain Nicaraguan presidency after crackdown on rivals

Former Sandinista rebel leader, who has governed since 2007, seeks unprecedented fourth term

Nicaragua's authoritarian leaders, Daniel Ortega and Rosario Murillo, are poised to extend their rule over the crisis-hit Central America country with an election that opponents and much of the international community have denounced as a charade.

Ortega, the Sandinista rebel who led Nicaragua during the 1980s and has governed continuously since 2007, will seek an unprecedented fourth consecutive term in Sunday's contest, which follows a ruthless six-month political crackdown on rivals.