Answer
No, Samak Sundaravej was not a leader of the Future Forward Party. He was a Thai politician who served as Prime Minister of Thailand from 2006 to 2008. He was a member of the Thai Rak Thai Party, which was dissolved by the Constitutional Court in 2008. The Future Forward Party is a political party in Thailand that was founded in 2018. It is led by Thanathorn Juangroongruangkit.