You can use these sites to see if the source of the information you want to use has already been researched.
AP Fact Check "Fact-checking, accountability journalism and misinformation coverage from AP journalists around the globe.
FactCheck.org A project of the Annenberg Public Policy Center of the University of Pennsylvania, this nonpartisan, nonprofit seeks to "reduce the level of deception and confusion in U.S. Politics (FactCheck.org - About Us)."
Politifact "PolitiFact is a nonpartisan fact-checking website that rates the accuracy of claims by elected officials and others who speak up in American politics. PolitiFact was created by editors and reporters from the Tampa Bay Times..." and is now owned by the Poynter Institute.