Top government epidemiologist Dr. Anthony Fauci and Sen. Rand Paul traded accusations of "lying" about gain-of-function research at a Tuesday Senate hearing, continuing the long-running feud between the National Institute for Allergy and Infectious Diseases (NIAID) director and the Kentucky senator. Fauci and Centers for Disease Control and Prevention Director Rochelle Walensky are also likely to face questions at a on whether the U.S. should bring back health measures like mask mandates as the delta COVID variant spreads around the country. In his questioning of Fauci, Paul stepped close to the line of accusing Fauci of lying to Congress in...