Mona Ingeborg Sahlin ( born Andersson on March 9 , 1957 in SollefteÃ , Sweden ) is the new leader for the Swedish Social Democratic Party after GÃ ran Persson 's 10 years as leader . Mona Ingeborg Sahlin ( nÃ e Andersson ; born 9 March 1957 ) is a Swedish politician and the former leader of the Swedish Social Democratic Party .