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.