Arunachal Pradesh political crisis and President Rule:

• Barely two months after a Supreme Court ruling restored the Congress government in Arunachal Pradesh, Chief Minister Pema Khandu left the Congress and joined the People’s Party of Arunachal (PPA), taking 43 MLAs with him. The government did not fall, but the ruling party was changed.
• This was the second time that President’s Rule was imposed in the State after it was granted full statehood in 1987. There followed bitter recriminations between the Congress and the National Democratic Alliance (NDA). On February 19, President’s Rule was lifted.
• The same day, the Supreme Court rejected the Congress’ plea for a floor test in the Assembly, and on February 20, Pul was sworn in as the Chief Minister.
• Chief Minister Nabam Tuki resigned, a few hours ahead of the much-anticipated floor test. Pema Khandu, son of former Chief Minister Dorjee Khandu, was elected as the chief of the Congress Legislature Party.
• Supreme Court had ordered restoration of the dismissed Congress government by quashing all orders and decisions of the Governor taken since December 9, 2015. 
• In this long and convoluted political drama, the Governor’s position and role was seriously compromised. 
• These events, therefore, did not hold good for Indian federalism as it saw interference of the Union government into the political matters and government formation of the state government.