But the former Union Minister reacted sarcastically to the move, saying this would mean the state leadership would finally read what he actually wrote instead of oral summaries.
Holding that Tharoor's adulatory statements about Modi had hurt Congress workers' sentiments in Kerala, the KPCC resolved to draw up a report and submit it to the high command.
The decision was taken by a meeting of Chief Minister Oommen Chandy, KPCC President V M Sudheeran and Home Minister Ramesh Chennithala held at the party state headquarters here.
"Kerala has rejected BJP completely. This is mainly due to the democratic and secular outlook of the people and the hard work of Congress," he added.
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Reacting to the move against him, Tharoor, who retained his Thiruvananthapuram Lok Sabha seat in the polls this year, tweeted he was delighted as KPCC decision would mean the leaders would read what he had actually written.
The Tharoor issue has been dominating the debate in Congress circles and media for the last few days with a section in the party expressing open displeasure at his praising Modi.
Imparting further momentum to concerted attack on him, the party mouthpiece "Veekshanam" yesterday carried a stinging editorial casting doubts on his loyalty to Congress when it is going through hard times.
On his part, Tharoor had sought to set the record straight by asserting his support to Modi's initiatives like "Swachh Bharat" did not mean that he was endorsing the "Hindutva agenda" of BJP and rejected outright the suggestions of him moving closer to the saffron party.