SummarySummary Companies Tinubu succeeds former military leader BuhariNigeria divided after disputed electionAfrica's biggest economy faces headwindsInsecurity spread under BuhariABUJA, May 29 (Reuters) - Bola Tinubu was sworn in as Nigeria's president on Monday, facing mounting calls to improve economic and security conditions which many complain worsened under his predecessor Muhammadu Buhari. Tinubu, the former Lagos state governor and a member of Buhari's party, has promised to be a better steward of Africa's biggest economy and most populous nation. A raft of protectionist economic policies and foreign currency interventions have also spooked investors. Buhari defended his record on Sunday, saying new infrastructure such as roads, bridges and airports, and the protectionist policies have laid the foundations for future growth. Separatist and gang violence plague the southeast, and clashes between farmers and herders persist in hinterland states known as Nigeria's Middle Belt.

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