The Tamil Nadu party said that the EC should work with the principle "Caesar's wife must be above suspicion".
The EC has announced election dates for the Himachal Pradesh assembly but did not announce it for Gujarat.
"Many political leaders have pointed out that the EC has now presented an opportunity to Prime Minister Narendra Modi to attend various events in Gujarat and announce new schemes by delaying the announcement of the poll dates as there would be no model code of conduct," DMK working president MK Stalin said.
He added that his party had often highlighted what he termed as the "one-sided" approach of the Election Commission.
"We are duty bound to point out that such allegations against the EC, which has to work by the principle Caesar's wife must be above suspicion, will malign its autonomous functioning," Stalin said in a letter to party workers on a day when PM Modi is in Gujarat to launch various initiatives.