The mass shootings in San Bernardino have awakened American fears of a major terrorist attack on U.S. soil, bolstered public support for increased monitoring of terrorists in the U.S. and raised concerns over flying and visiting the mall.
The CNBC All-America Economic Survey found 34 percent of respondents "very worried" about a major terror attack in the United States, up from 26 percent before the San Bernardino massacre.
In a finding with significance for the presidential race, 28 percent of Democrats now say they are very worried, up 8 percentage points. Democrats are still not as concerned as Republicans, 45 percent of whom say they are very worried, a 5-point gain.
(A note on the survey: The pre-San Bernardino results are from an initial poll of 800 Americans conducted for CNBC by Hart Research and Public Opinion Strategies Nov. 29-Dec. 2. The poll has a margin of error of 3.5 percentage points. Following the attack, pollsters re-interviewed 347 of the original respondents Dec. 5-7. The new poll has a margin of error of 5.2 points, and provides a unique look at how attitudes changed just before and just after the attack.)