Nationalist Congress Party chief and agriculture minister Sharad Pawar had refused to join the UPA government if it was led by Sonia in 2004, recalled party spokesperson D P Tripathi. Tripathi told reporters on Saturday that Pawar's stand was in keeping with the party's public stand. "Pawar had said that he was not ready to work under a Prime Minister who with foreign origins," Tripathi said, adding that the NCP chief had made a public statement about his reservations after formation of the UPA government in 2004.