Story highlights Hillary Clinton leads Bernie Sanders 58% to 30%, according to a poll out from CNN/ORC of Democratic primary voters

Clinton has benefited since October's version of the poll as other opponents have dropped out or declared they weren't running

Clinton has also benefited from a race that has prioritized foreign policy in recent weeks

(CNN) In a Democratic field that has winnowed to just three candidates, Hillary Clinton has regained a dominant lead over Vermont Sen. Bernie Sanders, topping him by a 28-point margin, her widest in CNN/ORC polling since July.

Clinton leads Sanders 58% to 30%, with former Maryland Gov. Martin O'Malley registering just 2%, according to a CNN/ORC Poll released Friday.

The poll finds Clinton widely seen as better able to handle matters of foreign policy than Sanders, an advantage that has likely helped the former secretary of state as global affairs and national security have gained prominence in the presidential campaign. Broad majorities of Democratic voters report that they trust Clinton most on foreign policy (74%) and handling ISIS (59%), and as best able to handle the responsibilities that come with being commander-in-chief (64%).

The poll, conducted after the terrorist attack in Paris but before Wednesday's shooting in San Bernardino, California, finds that nearly three-quarters of Democrats now consider foreign policy extremely or very important to their vote, up from 64% in early September. Terrorism has also gained in importance, from 72% considering it extremely or very important in September to 79% now.

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