Complex sentence: He had applied as a candidate of the Presidential Elections in 2005, however, even before the PEC could reach its decision regarding Kuan's eligibility, he was reportedly discredited by the media through statements that alleged his incompetence and casted doubts on his character.
Split into simpler sentences: He had applied as a candidate of the Presidential Elections in 2005. However, even before the PEC could reach its decision regarding Kuan's eligibility, he was reportedly discredited by the media through statements that alleged his incompetence and casted doubts on his character.