Black Americans form important grassroots support for president Obama and the Democrats. For US citizens whose roots lie, just like Barack Obama's, in Kenya, the president plays an even more special role. The Tumaini Community Church in Springfield is a center for Kenyans and other Africans living in Massachusetts’ third largest city. Tumaini means “hope” in Swahili, says Reverend Joseph Kimatu. He counts about 500 Kenyans in Springfield and thousands more in other cities and towns in his state. Overall, an estimated 600.000 to 1 million Kenyans are living in the United States. “Nigerians were the largest African community in...