Former Maharashtra Chief Minister Uddhav Thackeray today announced an alliance with Prakash Ambedkar's Vanchit Bahujan Aghadi (VBA) as he preps for the upcoming Mumbai civic polls, the first major election since his Shiv Sena split last year, bringing down his government. Uddhav Thackeray has been in talks for over two months with Prakash Ambedkar, the grandson of Bhim Rao Ambedkar, who drafted India's Constitution.