Prime Minister Manmohan Singh will return from the Rio Summit by June 24.
Pawar's remarks have come on a day when Trinamool Congress chief Mamata Banerjee is meeting Dr Singh and Congress chief Sonia Gandhi to discuss the issue of President election.
Sources in Trinamool Congress said that the PM has invited Banerjee for a meeting. Gandhi had deliberations with Banerjee, Pawar and leaders from other UPA allies like the Dravida Munnetra Kazhagam and the Rashtriya Lok Dal earlier also on the issue but Wednesday's meeting with the Trinamool Congress chief is considered crucial, which could lead to firming up of UPA's choice on its Presidential nominee.
There have been indications from the NCP, DMK and RLD that they are comfortable with Pranab Mukherjee's candidature for the post but at the same time they won't have problems with any other name proposed by the Congress.
The Trinamool Congress has, however, kept up the suspense over the issue. The ruling Congress also said a few days back that "no candidate has been finalised" even as Mukherjee appeared emerging a front-runner in the race.
The Nationalist Democratic Authority convenor Sharad Yadav said the Opposition alliance is yet to finalise names for the posts of the president and vice president.
The Election Commission has announced July 19 as the Presidential poll date.
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