Apart from leaders of states and union territories, senior leaders on the Congress Working Committee or CWC, including former Prime Minister Manmohan Singh, AK Antony, Ahmed Patel and Ghulam Nabi Azad submitted different sets of nomination papers. With Rahul Gandhi in all likelihood to be the only candidate in the fray, he could be declared the next Congress chief on tomorrow after scrutiny of nominations. He will succeed his mother Sonia Gandhi, the longest serving Congress chief who has steered the party since 1998. Rahul Gandhi became the Congress Vice President in January 2013.