When Russia's intelligence agencies obtained some of the National Security Agency's secrets about its own cyberweapons, it appeared to do so by manipulating a virus protection program sold by Kaspersky, a Russian firm.

Although Mr. Trump will not be able to pull the United States out of the Paris climate accord, he can legally ignore its provisions, in keeping with his questioning of the existence of man-made climate change.

A Trump presidency will plunge the United States into an era of unknowns that has little parallel in the nation's 240-year history.

David E. Sanger Quotes