Prime Minister Narendra Modi launched a sharp attack on the Congress during a public meeting in Bengaluru, accusing the opposition party of 'betraying' allies and people alike.
Modi alleged that the Congress had lost public trust across the country due to 'fake guarantees', poor governance, and internal power struggles.
The Congress joined hands with actor-turned-politician Vijay's Tamilaga Vettri Kazhagam (TVK) to form a coalition government in Tamil Nadu, despite contesting the polls with the DMK, which lost power.
Congress leader Rahul Gandhi was in Chennai for Vijay's swearing-in on Sunday.
Modi said no Congress state government has returned to power a second time and that the party turns on its own partners whenever political equations change.
The PM alleged that the Congress is a 'parasitic political force' that survives at the expense of regional parties.
Vijay was sworn in as the Tamil Nadu CM on Sunday in a colourful ceremony attended by Rahul Gandhi, ushering in the first non-DMK, non-AIADMK government in the southern state in 60 years.