Not just Kolkata-Delhi sector but trains of Bengal in general. Popular trains like Ratna, Mayurakshi, Darjeeling Mail got some unnecessary extensions. A lot of trains from Bengal got halt unnecessary halts in various states, for instance the Jamtara halt of Poorva. BJP needs to stop these type of unnecessary controversies just before the election, else this is going to hurt their election prospects.
For example, just the last day, I saw BJP has fielded Bhojpuri singer Pawan Singh as the candidate of Asansol, despite Asansol being a part of Bengal,...
more... to please the Hindi speaking migrants of the region, the same Bhojpuri singer Pawan Singh who sung derogatory songs that passes sexual slurs on Bengali women. Afterwards, the outrage against his candidature, even from the Bengali workers of BJP itself, became so intense that they had to withdraw his candidature within 24hrs of the publication of the candidate's list.
And now these type of unnecessary proposals of extension of popular trains like Poorva simply going to hurt their image in the state.