Wisconsin Gov. Scott Walker became the 15th Republican to officially declare he is running for president of the United States. “I’m in,” he tweeted to his followers this morning.
Locations: National
Is Medicaid Bad for Your Health?
Cruz Off on Hispanic Unemployment
The EPA Will Not Regulate Your Barbecue
Clinton Spins Immigration, Emails
Polar Bears and Extreme Weather
SciCheck writer Dave Levitan of FactCheck.org was interviewed by Ira Flatow for a segment on Science Friday about the 10th International Conference on Climate Change.








