The word media is plural for medium, so media are would be correct here.
FROM THE SAME ARTICLE: Unruh, like all Colorado delegates, were supporters of Sen. Ted Cruz during the Republican primary and her opposition to Trump is fueling her effort.
The problem here is that Unruh is directly connected to were supporters. So was a supporter would work. Unruh was a supporter of Cruz; so were the other Colorado delegates. I've also added a comma after primary.
Unruh, like all Colorado delegates, was a supporter of Sen. Ted Cruz during the Republican primary, and her opposition to Trump is fueling her effort.
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