boston propose massachusetts ballot initiative would allow voters require u.s. presidential candidates release tax return clear key hurdle wednesday state lawmakers mull similar bill president donald trump decline release return state attorney general maura healey democrat certify initiative petition along 20 others cover variety topics meet constitutional requirements ballot question propose massachusetts law would require candidates u.s. president vice president submit state secretary copy federal income tax return last six years could make public certification petition mean backers begin collect tens thousands signatures need get question onto november 2018 ballot healey office say decision mean support petition election-related initiative come trump republican last year become first major presidential candidate since 1970s voluntarily release least tax return healey certification petition come state lawmakers hold committee hear take testimony bill would require u.s. presidential candidates also disclose tax return order get onto ballot senator michael barrett bill democratic sponsor interview say bill lot grassroots interest receive support march forward mass form women march protest hold january day trump inaugurate william galvin democratic secretary state testify support bill say public disclosure tax return need order voters know candidate potential conflict interest bill donald trump say donald trump barrett acknowledge law could subject lawsuits u.s. constitution set qualifications become president critics could argue state law would unconstitutionally galvin testify believe law require tax return disclosures could survive legal challenge state right set condition get ballot similar proposals consider state republican new jersey governor chris christie may veto bill would require disclosure presidential candidates tax return call politics bad massachusetts ballot initiative president tax return pass hurdle