Liana told PTI that the Congress being the main opponent of his Mizo National Front and he could not support the Congress-led UPA government at the Centre.
Though the MNF, the main opposition party in Mizoram, had snapped ties with the National Democratic Alliance five years back because of differences on secular issues, it continued to oppose the UPA government in Parliament.
Former chief minister and president of the MNF Zoramthanga had said on Thursday that Liana was free to cast his vote according to his conscience.