Donald Trump threatens to sue the conservative Club for Growth if it doesn’t pull its TV ad claiming he “supports higher taxes.” The group says it is merely exposing Trump’s “very liberal” record. Who is right?
Social Security Bunk — Again
Carson Rewrites Laws of Thermodynamics
Paul Distorts Islamic Views of Bombings
Clinton’s Email Narrative, Interrupted
Fiorina’s Unsupported Claim about VA Deaths
Fiorina Misleads on HP and Iran
Doubling Down on Falsehoods
Mailbag: Debate FactChecking
Readers sent us letters about our coverage of the second Republican presidential debate on Sept. 16.