The group Free Press has joined a long list of those that oppose Sinclair's takeover of the Tribune stations. 

The group describes itself as a are nonpartisan organization advocating for universal and affordable Internet access, diverse media ownership, vibrant public media and quality journalism.

"Sinclair is notorious for slipping right-wing views and Republican talking points into its newscasts. The company overrides the objections of local journalists and forces its stations to run conservative commentaries and slanted stories on the local news," Free Press says in the online petition. 

They then add, "Sinclair has evaded FCC rules, received FCC fines for airing propaganda, and drawn wide criticism for airing politically slanted content on its stations. The FCC should block this merger and restore policies that encourage a diversity of local media owners and a wide range of viewpoints." 

You can look at or sign the petition at this link.