"The Congress government is behaving as if it enjoys complete majority. It is taking decisions without consulting alliees," SP General Secretary Ram Gopal Yadav told reporters here.
He said Trinamool chief Mamata Banerjee was "forced" to pull out as she did not like the "style of functioning of the government".
Asked about the stand of his party following TMC's move, he said SP's relationship with UPA is independent of any other ally.
"Our decision will be independent. We will take a call after the September 20 bandh against FDI in retail and diesel price hike," he said.
Asked whether the government will collapse following TMC's decision, Yadav said it was a "serious issue".
Meanwhile, SP supremo Mulayam Singh Yadav reached Delhi tonight.