Original sentence: In 1996 and 2000, he was the nominee of the Green Party; in 2004, he ran as an independent and was endorsed by the Reform Party
Edited sentence: His campaigns have proven very controversial, his role in the 2000 election in particular being subject to much analysis and debate.In 1996 and 2000, he was the nominee of the Green Party; in 2004, he ran as an independent, but was also endorsed by the Reform Party