 Complete the following phrase:  In October 1964, Podgorny participated in a coup replacing Soviet leader Nikita Khrushchev with a troika consisting of himself, Premier Alexei Kosygin and General Secretary Leonid Brezhnev. On 6 December 1965, he replaced Anastas Mikoyan as Chairman of the Presidium of the Supreme Soviet. After Kosygins standing was damaged in the wake of the 