New Delhi:The Congress on Saturday welcomed the latest political developments in Arunachal Pradesh wherein all rebel party legislators have come back to the party fold and said that this proves that only it can provide a stable administration in the northeast. "This has been proved now that only Congress give stable administration in the northeast," Congress spokesman Randeep Singh Surjewala told reporters here. He also said the clear verdicts from the highest court of the land - the Supreme Court - on Uttarakhand earlier and lately on Arunachal Pradesh should serve as a big "lesson" for Prime Minister Narendra Modi "who wanted to pursue a politics of destabilising" opposition party-led governments in the states. Surjewala hoped that now with the change of regime in Arunachal Pradesh and return of Congress government, the central government will extend all necessary cooperation to it for the development of the border state. He also lashed out at BJP chief Amit Shah for precipitating a politics of destabilising the Congress-ruled state governments. In a dramatic development earlier in the day, Chief Minister Nabam Tuki resigned as Congress Legislature Party (CLP) leader and later as the chief minister. In a meeting in state capital Itanagar, Congress legislators including the rebels elected Pema Khandu as the new CLP leader. The proposal was supported by all the 44 legislators, including 15 Congress and 29 dissident Congress legislators who had joined the People's Party of Arunachal (PPA) in February.