Support for the ban reached its height in 1999, when The New York Times/CBS poll found that 76 percent of Americans supported a ban and only 21 percent opposed it. The most recent poll found that only 44 percent supported a ban, with 50 percent in opposition.
Terrorism benefits both gun manufacturers, whose sales skyrocket after attacks, and, it seems, opponents of gun control. Even though the weapons used in the San Bernardino attack were acquired legally—the two assault weapons were purchased by a friend—that attack, along with the one in Paris in early November, appear to have had a profound influence on the polling. According to the Times, Americans are more afraid of terrorism than they have been at any point since the immediate aftermath of 9/11.