Rhode Island General Laws, Section 17-19-49 currently prohibits the display or distribution of any poster, paper, circular or document that would aid, injure or defeat any candidate for public office or any political party or any question on the ballot.
This law prohibits such display within the voting place or within fifty (50) feet of the entrance or entrances to the building in which voting is taking place at any primary or election.
Election officials, that is, wardens, moderators, clerks and bi-partisan supervisors, assigned to a polling place are also prohibited from displaying or wearing any political party button, badge or other device that is intended to aid, injure or defeat the candidacy of any person for public office or any question on the ballot or to intimidate or influence any voter.
The State Board of Elections has oversight of the conduct of elections at polling places and that office should be contacted if you have any specific questions as to what campaigning is allowed.