Senior Congress leader Anand Sharma on Monday slammed the party's tie-up with Indian Secular Front led by cleric Abbas Siddiqui in West Bengal. Sharma said it was against the "Gandhian and Nehruvian secularism" and the party cannot be selective in fighting the "communalists". Sharma, a former union minister and a leader of the group of 23 which had written to Congress president Sonia Gandhi demanding organisational overhaul, said the issue of "alliance" with a radical party like the ISF should have been discussed and approved by the Congress Working Committee. He also sought clarification from West Bengal Congress chief Adhir Ranjan Chowdhury for attending the joint rally in Kolkata where ISF leaders were present. Sharma said that Chowdhury's presence and endorsement was "painful and shameful".