Salamualaykum Hukm on participating(voting, campaigning, running as president etc) in a democratic student council in university, who's main job is to raise the issues of the student body to the administration, and to deal with issues such as food and housing prices etc? Usually involves freemixing.

Ustadh AbdulAziz al-Haqqan

If it involves free mixing, then this is not allowed. As for the elections and everything that you have mentioned, Allah knows best.