Complex sentence: In 1993 he unsuccesfully ran for municipal president (mayor) of Acapulco representing the PRD then in 1994 he secured a seat in the Chamber of Deputies of Mexico via proportional representation to serve during the LVI Legislature.
Split into simpler sentences: In 1993 he unsuccesfully ran for municipal president (mayor) of Acapulco representing the PRD. Then, in 1994, he secured a seat in the Chamber of Deputies of Mexico via proportional representation to serve during the LVI Legislature.