The expectations at this stage, pent up through the previous phases, generally exceed your ability to meet them. Some days nothing seems to work as planned. People need to know what's coming, when and why. Conduct informal communications sessions, assign one of your team members to each major user community to keep them informed. Use newsletters, videos and paycheck stuffers.
Reorganizations occur, businesses are acquired, alliances shift, expectations change.
That's why the political process is a continuous one. You can't just do it once and consider it done. In politics, the next campaign starts the day after the election. Following your own successful campaign, you will be focused on the minutia of implementation. Presidential elections occur once every four years.