Diptanshu Choudhury, a former colonel who served in the Kargil War, joined the BJP in 2016, but quit to join Trinamool Congress the next year.
Modi had said, “Can your first vote be dedicated to those who carried out the air strike.”
Modi has made national security the main plank in the Lok Sabha elections that began on April 11.
Modi appealed to first-time voters at a poll rally in Latur district of Maharashtra.
At election rallies in recent weeks the BJP has played up the airstrikes and a subsequent anti-satellite missile test that Modi hailed as making India a military space power.
Pakistan's Foreign Office said it is willing to allow visits to these locations, on request.
Sajjad Khan was tasked to establish a sleeper cell in Delhi, police said.
"We need to know the facts," Congress' Sam Pitroda said in an ANI interview.
Yadav, a general secretary in the Samajwadi Party (SP), said once there is a change at the Centre, investigations will be conducted into the incident.
The proposal was a fourth such bid at the UN in the last 10 years to list Azhar as a global terrorist. China has been blocking the moves.