Nearly 10 years after Congress instituted measures to make it easier for women to lodge harassment complaints, lawmakers and aides say the behavior is still rampant.

The president said a potential arms deal for Taiwan was a “very good negotiating chip” in talks with Beijing. His words raise questions about the steadfastness of U.S. support.

Izz al-Din al-Haddad took over the group’s military wing in Gaza last year. Hamas’s official broadcaster appeared to confirm Mr. al-Haddad’s death, although the group has yet to formally comment.