His remarks came at a time when "like-minded" opposition parties are mulling over fielding a common candidate for the presidential polls.
The Marxist party has already agreed to the idea of fielding a consensual candidate.
"Do you want communal supervision or secular supervision of the Constitution? We want secular supervision," he said, replying to a query by media persons.
Opposition leaders, including Congress president Sonia Gandhi, have held a series of meetings over the issue recently.
Pranab Mukherjee, a Congress veteran who was elected as president in 2012, will demit office in July.
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