Sheikh Yaqub today was seen addressing an election rally ahead of this weekend's election in Lahore.
Yaqub has little chance of success given that Kulsoom Nawaz, Sharif's wife, is expected to easily win Sunday's vote.
Yaqub's supporters have displayed posters, showing him with Hafiz Saeed, the founder of the Lashkar-e-Taiba militant group.
Saeed has a USD 10 million US bounty on his head for his alleged involvement in the killing of more than 160 people in the 2008 Mumbai terrorist attack.
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