NAIROBI, Kenya (AP) — Tanzanians will vote Wednesday in an election that pits incumbent President Samia Suluhu Hassan against opposition candidates from smaller parties after her main rivals were barred from running. A win for Hassan would extend the lengthy rule of her party, known as Chama cha Mapinduzi, or CCM, a version of which has held power in the East African country since 1961. Amnesty International criticized the atmosphere around the polls as characterized by fear, citing cases of