Congress president Sonia Gandhi kickstarted the party's election campaign in Haryana by addressing a public rally in Karnal.
Sonia was flanked on stage by Kumari Selja and Bhupinder Singh Hooda. As per the schedule, Sonia Gandhi would tour the state twice ahead of the October 13 Assembly poll and address four rallies.
Prime Minister Manmohan Singh and party general secretary Rahul Gandhi would join the campaign late next week.
Samajwadi Party chief Mulayam Singh Yadav too launched his party's campaign for the Haryana Assembly election on Sunday.
Mulayam campaigned for his daughter-in-law Dimple who is contesting on the Firozabad seat in the by-election and will cross swords with Raj Babbar of Congress.
Bahujan Samaj Party chief Mayawati kickstarted the election campaign for her part in the Maharashtra Assembly by holding first public rally in Pune. The BSP is contesting 282 seats in Maharashtra.