The Delhi government moved the Supreme Court to quash an ordinance for the following reasons: 1. Ordinance on the 'Government of National Capital Territory of Delhi (Amendment) Bill, 2021': The ordinance, introduced by the central government, seeks to amend the Government of National Capital Territory of Delhi Act, 1991. 2. Centralization of power: The ordinance grants more powers to the Lieutenant Governor (LG) of Delhi, appointed by the central government, while limiting the decision-making authority of the elected government. This centralization is seen as a threat to the democratic functioning of the Delhi government. 3. Conflict between LG and Delhi government: The ordinance attempts to override the 2018 Supreme Court verdict that recognized the elected government's decision-making powers in all areas, except for police, public order, and land. 4. Constitutional validity: The Delhi government has raised concerns about the constitutional validity of the ordinance, arguing that it infringes upon the federal structure and principles of parliamentary democracy. 5. Need for judicial review: In order to protect their legislative and executive authority, the Delhi government has approached the Supreme Court to examine the ordinance's legality and seek its quashing. Overall, the Delhi government's move to challenge the ordinance aims to protect the power and autonomy of the elected government in decision-making processes.