Finding Campaign Reports in Google Analytics
Confirm you are logged into Google Analytics.
Navigate to the Campaigns link in the menu on the left.
Click All Campaigns.
Next, you can drill down into your reports using the following options. If you are just interested in seeing the referring sources and mediums, you can click Source / Medium.
From this menu, you can begin to see a number of combinations of reports.
One setting that is really helpful is adding the Secondary Dimension so you can compare not just the Campaign traffic, but also other data that is provided to you by GA.