U.S. hopes Obama's visit to Ghana will spur others

* Washington wants Ghana trip to be a catalyst

* U.S. hopes others in Africa will adopt democratic norms

By David Clarke

NAIROBI, July 4 (Reuters) - The United States hopes President Barack Obama's decision to visit Ghana this month will spur other African governments to try and emulate the West African country's democratic record.

Ghana won independence from colonial rule in 1957. A bloody chapter of military coups followed, but since Jerry Rawlings introduced multi-party democracy in the 1990s, opposition parties have twice won power through successful elections.

"(Obama) believes strongly in the rule of law, democratic constitutional rule and the principles that underpin it," U.S. Assistant Secretary of State for African Affairs Johnnie Carson told reporters during a visit to Kenya.

"We hope that his support for democracy in Ghana will be a catalyst for others to also adopt democratic norms that are equally as strong," he said when asked if Obama was sending a message to Kenya by choosing the West African country.

Obama's Ghana visit has triggered a bout of angst in Kenya, his ancestral homeland, and Nigeria, Africa's most populous nation and a major supplier of oil to the United States. [ID:nL3721920]

Nigeria has an appalling record of organising transparent polls and ethnic violence after a disputed election in Kenya in 2007 killed at least 1,300 people and shattered its image as the region's stable economic powerhouse.