In this course, a popular source are defined as a "substantive piece published in a credible source (national newsmagazines, major newspapers, research organizations, education organizations," etc. You'll be using the source to support your claims, so even though you may use something you found online, you need to be sure it's credible.
In order to determine if the source is credible, ask yourself:
Library databases have access to news and magazine articles as well as scholarly sources. In the databases, you may have more access to back issues of newspapers and magazines that you would not find through a Google News search.
Search the Journal Finder for specific news publications, and then search within those publications:
For your position paper, you must find one piece of literature, poetry, piece of visual art, song, movie, etc. that reflects your argument.
There isn't one go to place to find creative sources, but you can use these search tips online: