Leader of Opposition in the Assembly Vijender Gupta alleged that the government was adopting "unconstitutional measures" and "repressing" the opposition as well as senior government officials.
"The opposition will launch an all-out attack on the government in the Monsoon Session for the U-turn on its promises, repression of the opposition and senior government officers and unconstitutional measures adopted by it," he told a press conference.
"The (Arvind) Kejriwal government is about to complete half of its term. It has gone back on its promises due to its incompetence and inaction," alleged Gupta.
He added that the Delhi government had "completely failed" on the health front, especially with regard to the supply of medicines, consumables and equipment.
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Gupta also said he would "expose" the House committees.
"These committees have been set up in contravention of constitutional provisions. They are taking over the executive and investigative functioning of the government," he claimed.
"Rai has violated the model code of conduct by announcing an enhanced financial allocation for the rural areas and special efforts to transform Bawana into a smart village," he said.
The Bawana Assembly constituency in north-west Delhi is scheduled to go to a by-election on August 23.