Congress president Rahul Gandhi Thursday appointed former chief minister Sheila Dikshit as the Delhi Pradesh Congress Committee chief, days after Ajay Maken resigned from the post citing ill health, in a bid to strengthen the party ahead of the Lok Sabha elections. Making the announcement at the party headquarters here, All India Congress Committee (AICC) in-charge of the party's Delhi unit, P C Chacko said Dikshit will be assisted by three working presidents -- Devender Yadav, Haroon Yusuf and Rajesh Lilotia..