The commander of the presidential guard in Niger claimed the leadership of the West African country with a televised address on Friday, two days after his military unit detained the democratically elected president and threw into uncertainty the future of a key Western ally in the region.
“We have decided to intervene and seize our responsibilities,” Gen. Abdourahmane Tchiani, who goes by the first name Omar, said on state television, where he was identified onscreen as the president of…