In a series of tweets, Chidambaram congratulated the BJP for winning the Assembly elections in Gujarat and Himachal Pradesh but said the Congress has returned a morale boosting performance in Gujarat under Rahul Gandhi.
"The battle is now joined for five states in 2018," he said.
Assembly elections are due in Karnataka, Meghalaya, Nagaland, Tripura and Mizoram in 2018.
The former finance and home minister said there is an electoral victory and there is a political victory in the results of the two states.
The BJP won the Gujarat Assembly polls for a record sixth straight victory today, and evicted the Congress in Himachal Pradesh.
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