Does sponsorship of Tower Forum breakfasts pay for or against any specific issue or candidate running for public office? 

No. It is an unrestricted sponsorship which is given to help defray costs of Tower Forum. It is a support of the venue - not any specific position on an issue or any candidate running for office.  Tower Forum is not compensated, directly or indirectly, to represent a designated side of an issue or endorse any candidate running for public office.