 Nyora kupfuurira kweiyi ndima - Akazvarwa mutaundi reHerzegovinian reGrude, Bandić akatamira kuZagreb kunodzidza kuti ave mudzidzisi weMarxism uye Dziviriro uye Dziviriro paYunivhesiti yeZagreb. Kutanga mukutanga kwema1980, akasimuka kuburikidza nematanho eLigi yeCommunists yeCroatia uye mutsivi wayo mushure me1990, Social Democratic Party SDP, achiva kanzura weguta muna 1995 uye purezidhendi webazi reZagreb reSDP muna 1997. Zvichitevera 1995-1997 Zagreb dambudziko, akatungamira kupikisa kupokana neHHDZ manejimendi inotungamirwa naMeya Marina Matulović Dropulić. Kumanikidza sarudzo dzenguva pfupi muna 2000, zvichitevera kudonha kwehurumende yenyika yeHDZ, Bandić akamhanya meya neSDP uye akahwina huwandu hwakawanda ne20 yemavhoti. Aizoita mamwe makore mashanu ari mujeri. Muna 2010, akadzingwa kubva kuSDP yekumhanyira mutungamiri weCroatia musarudzo dza200910, kwaakamhanyira uye akarasikirwa nechechipiri kumunhu akasarudzwa weSDP, Ivo Josipović. Muna 2015, akaumba bato idzva, Bandić Milan 365 Labor uye Solidarity Party, uye akapinda mubatanidzwa neHDZ. Kuva kwake meya kwakanga kwakazara nenyaya dzakaipa uye kwakakanganiswa kaviri. Nguva yokutanga yakanga iri kubva muna 2002 kusvika muna 2005 paakabatwa achitiza kubva panzvimbo yetsaona yaakakonzera achityaira akadhakwa uye achityisidzira mupurisa akamubata; akasiya basa uye akachengetwa semutevedzeri wameya wemabasa evanhu pasi peActing Mayor Vlasta Pavić. Nguva yechipiri yakanga iri muna 201415 nemhaka yokutongwa muAgram nyaya iyo yakanga ichiri kuenderera mberi panguva yorufu rwake. Bandić akaramba ari meya panguva yese yezviitiko, asi akarambidzwa kwenguva pfupi kuita mabasa ake uye masimba, uye akasarudza Sandra Švaljek uye gare gare Vesna Kusin sevanoshanda semameya vasati vatora mabasa avo zvizere. Zvimwe zvezvinonyadzisa zvakatungamirira mukutongwa kwevakuru vakuru veguta, asi Bandić pachake haana kutongerwa mhosva, kunyange zvazvo akabhadharwa nokuda kwekupesana kwechido. 