In 1988, he brought Mon politicians together in his house to form the
Mon National Democratic Front, as part of the
"8888" pro-democracy movement. He became vice-chairman of the MNDF, running for a seat in the
Mon State capital,
Mawlamyine, in the
1990 election. Thet helped reestablish the party in 2012, after political parties were allowed again. In 2015 he participated in the founding of the United Nationalities Alliance, which brought together eight ethnic minority political parties in Myanmar. He called for the implementation of a
federal system in Myanmar as a top priority and said a democratic system and the rule of law were "of great importance". He was appointed the Minister of Ethnic Affairs, a newly formed ministry, in 2015. Asked what his policies were, he said, simply, "I will follow [NLD Chairperson]
Daw Aung San Suu's instructions ... the country's ethnic minorities all love and trust her." Thet took office on 30 March 2015 as part of the first government of the country formed by the opposition
National League for Democracy (NLD) following their victory in the
2015 general election. The vice-chair of the
Mon National Party, he was one of only three ministers appointed to cabinet from a party other than the ruling NLD. == Personal life and death ==