The uncertainty over government formation in Tamil Nadu may clear by Saturday evening when VCK, a long time ally of the Left parties, is expected to spell out its stand on the crucial question of extending support to TVK to form government. The Vijay-led party faced serious allegations when NDA constituent AMMK accused it of alleged bid aimed at horse-trading. MLAs belonging to Congress, which has extended support to the TVK, have shifted to Hyderabad.