The Citizenship Amendment Act protests, also known as the CAA Protest, CAB Protest or CAA and NRC protests, occurred after the Citizenship Amendment Act was enacted by the Government of India on 12 December 2019. From Wikipedia
The defections of opposition leaders, including AAP councillor Masuma Begum, leave the GMC entirely aligned with the BJP and its ally AGP, marking a significant political consolidation in Assam.