WASHINGTON — Over three-quarters of Americans doubt the nation’s ability to stop “lone wolf” terrorist attacks by individuals acting on their own, according to a new Washington Post-ABC News poll.

Despite widespread doubts about security, the poll finds fears of a family member being a victim of terrorism have not risen since a shooting in San Bernardino, California, killed 14 and attacks in Paris last month that left 130 people dead.

President Obama, who addressed the nation in a rare Oval Office speech following the shootings, continues to receive negative marks for handling terrorism and dealing with Islamic State militants. Despite his call for greater gun restrictions aimed at keeping high-powered guns out of terrorist hands, the Post-ABC poll finds record high opposition to a ban on assault weapons.

The San Bernadino shooting joins a series of attacks in recent years by individuals without clear coordination with radical groups such as al-Qaida. The married couple who opened fire at a work holiday party pledged allegiance to the Islamic State on Facebook, according to federal investigators, but the group has not linked itself as clearly to the shooting as it has to the Paris attacks. The FBI has expanded its investigation to a growing network of people with close ties to the shooters, Syed Farook and Tashfeen Malik, based on cooperation with a neighbor who legally purchased two rifles used in the attack.

San Bernardino shooting investigation expanding to larger network of people

Americans express far less confidence in the country’s ability to thwart attacks by individuals than foreign terrorist groups.