Once these elections are over, you could contact the staffs of the candidates and ask them about their outcomes from political websites, both in terms of fundraising and volunteers.
The only way to make a difference is to have people on-site that can provide two-way communication support. Without a budget, you’ve got three main options — as long as your leadership is serious about increasing and improving communication.
Overcoming the most common excuses for not measuring communication: No time. No budget. Lack of research expertise. Lack of management support.