Where can I see all my existing (active) Campaigns? (Champions)

You can find a summary of past Campaigns, ongoing Campaigns, and draft Campaigns in more than one location; Campaigns and Campaign Insights.

Campaigns view

1. Select Campaigns from the left menu bar.   
2. From the Campaigns creator page, locate the drop-down menu from the top tab that will either say active, draft, or archived depending on which filter you selected previously.   

You will see a list of all your Campaigns for each filtered selection (active, draft, archived).   

Campaign Insights view

1. Navigate to the Campaign Dashboard view by selecting Dashboard from the left menu bar.   
2. On the Campaigns creator page, you will see a list of all your Campaigns in the Overview tab.