Gueiler was born in
Cochabamba, to Moisés Gueiler Grunewelt, an immigrant from
Germany and a
Bolivian mother, Raquel Tejada Albornoz. She received a
BA degree from Instituto Americano in Cochabamba. In the 1940s, she joined the
Movimiento Nacionalista Revolucionario (MNR). When that
party came to power as a result of the 1952
National Revolution, Gueiler became a member of the
Congress of Bolivia, serving in that capacity from 1956 until 1964. In 1964, she went into exile abroad after the MNR was toppled from power by generals
Barrientos and
Ovando. She spent the next fifteen years out of the country, and joined
Juan Lechín's
Revolutionary Party of the Nationalist Left (PRIN). She also became the vice-president of the
Revolutionary Left Front. Upon returning to Bolivia in 1979, Gueiler again ran for Congress and was elected President of the
Chamber of Deputies of Bolivia (the lower house of the Bolivian Congress) as part of the MNR alliance of former president
Víctor Paz Estenssoro. As no presidential candidate in the 1979 elections had received the necessary 50% of the vote, it fell to Congress to decide who should be president. Surprisingly, no agreement could be reached, no matter how many votes were taken. An alternative was offered in the form of the President of the
Senate of Bolivia, Dr.
Wálter Guevara, who was named temporary Bolivian President in August 1979 pending the calling of new elections in 1980. Guevara was shortly afterwards overthrown in a
military coup led by General
Alberto Natusch. The population resisted, however, led by a nationwide
labor strike called by the powerful
Central Obrera Boliviana ("COB") of Juan Lechín. In the end, Natusch was able to occupy the
Palacio Quemado for only sixteen days, after which he was forced to give up power. The only face-saving concession he extracted from Congress was the promise that Guevara not be allowed to resume his duties as president. ==Interim President of Bolivia==