Left-wing deputies in Mexico have taken over the stage in Congress, forcing outgoing President Vicente Fox to abandon his final annual address. Before Mr Fox arrived, the legislators, who allege fraud in recent elections, marched onto the main podium where they shouted slogans and sang songs. Mr Fox will deliver his speech on television from his official residence. The deputies back Andres Manuel Lopez Obrador, who says fraud denied him victory in July presidential elections. Thousands of his supporters have also been protesting outside Congress. They have been engaged in a tense stand-off with hundreds of riot police, although the...