Which activity is to both public officials and interest groups?
placing propaganda that uses name-calling in the media
working for the election of sympathetic public officials
organizing protests and marches to disrupt people's lives

Explanation:

An employee of a leader of a political party, governmental authority, political candidate, official of a public international organisation, state-owned enterprise's officer or employee, including a state-owned etc are called as "Public official".

During elections many demanding duties come out which need participation from other people in most ethical and regulated way but under law. Indulging in duties or volunteering during elections of sympathetic public officials will be benefited to both the parties i.e officials and groups.