Louisiana Sen. Bill Cassidy was one of seven Republican senators who voted to convict President Trump. Now he's running for reelection in a race that will test Trump's hold on…

A new study suggests genetic changes allow horses to produce more energy, while minimizing the toll the energy takes on cells.

Access to the COVID-19 vaccines remains difficult because of an unusual and unexplained delay by the Centers for Disease Control and Prevention in accepting recommendations from its advisers.