"Netaji will be addressing an election rally in Jaswant Nagar tomorrow," Shivpal said.
This will be Mulayam's first election rally after a number of flip-flops as to whether he would campaign for Samajwadi Party post Akhilesh Yadav taking over the reins of the party after a bitter power struggle.
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Mulayam was angry over SP going in for an alliance with Congress and had said he would not participate in campaign. However, in a U-turn the very next day, he said his blessings were with his son and he would be campaigning.
Jaswant Nagar constituency will go to polls in phase-3 on February 19.
Mulayam's rally incidentally coincides with the first phase of polling in the state tomorrow.
UP will have seven-phase polling ending March 8.