 Complete the following phrase:  Politically, the Shiv Sena was anti-communist, and wrested control of trade unions in Bombay from the Communist Party of India CPI. Local unemployed youth from the declining textile industry joined the party and it further expanded because of Marathi migrants from the Konkan region. By the 1980s, it became a threat to the ruling Congress party which initially encouraged it because of it rivalling the CPI. In 1989, the Senas newspaper Saamna was launched by Thackeray. Because of Thackeray being against the Mandal Commission report, his close aide Chhagan Bhujbal left the party in 1991. Following the 