He was first elected to the state Assembly in 1978 from Mizoram-Myanmar border Champhai constituency and was re-elected in 1979 from the same seat.
The Congress party defeated the ruling People's Conference (PC) led by the then chief minister Brig. Thenphunga Sailo in 1984 when Lal Thanhawla, elected from Serchhip seat became the third chief minister of Mizoram.