Samajwadi Party chief Akhilesh Yadav on Wednesday said his father Mulayam Singh Yadav, whom he refers to as 'Netaji', tried hard to convince Aparna Yadav to not join BJP. Aparna is married to Prateek Yadav, son of Mulayam's second wife. In his first reaction to Aparna's decision, Akhilesh added, "I'm happy that our socialist ideology is expanding."