Guevara won the primary over Diaz by a 10 % margin .
Candidates were deputy Natalia Diaz , and historic leader and deputy Otto Guevara Guth , who will attempt to run for presidency for the fifth time .
deputy won the primary over deputy by a 10 % margin .
Candidates were deputy Natalia Diaz , and historic leader and deputy Otto Guevara Guth , who will attempt to run for presidency for the fifth time .