501c3 Rules for Meeting Room Use

I need clarification about the IRS regulations on 501c3 organizations. A local political group asked to use our meeting room space for a 'meet the candidates' event, a library trustee thinks this is not compliant with the "The Restriction of Political Campaign Intervention by Section 501(c)(3) Tax-Exempt Organizations" https://www.irs.gov/charities-non-profits/charitable-organizations/the-restriction-of-political-campaign-intervention-by-section-501c3-tax-exempt-organizations

I think our meeting room policy is very out of date and restricting access to the room based on content of the meeting violates 1st amendment rights, as outlined by ALA: https://www.ala.org/advocacy/intfreedom/librarybill/interpretations/meetingrooms

No staff are involved in this event, we have not helped plan it and it was made clear on all the publicity the political group put out that the library is only the venue, we are not hosting, this is not a library program.

Thank you!