No image available				
			
			
			 / 25 February 2008
			
		
		A Nigerian tribunal will rule on Tuesday whether the election of President Umaru Yar’Adua was valid, a decision that could entrench a disputed government or tip Africa’s most populous nation into turmoil. Yar’Adua won a landslide victory in last April’s elections but observers accused the party of widespread vote-rigging.
		
	 
	
		
			
				
					No image available				
			
			
			 / 21 November 2007
			
		
		Umaru Yar’Adua looks serene in the official portrait hanging in a courtroom where lawyers in black robes are trying to unseat him as president of Nigeria. But his position may be less secure than the photograph. The presidential tribunal is a special electoral court empowered to hear petitions against his victory in April by losing candidates.