A majority of Americans say the United States is less respected in the world than two years ago and believe President Obama and other Democrats fall short of Republicans on the issue of national security, according to a poll by two left-leaning groups.

The Democracy Corps-Third Way survey released Monday finds that by a 10-point margin — 51 percent to 41 percent — Americans think the standing of the United States has dropped during the first 13 months of Mr. Obama's presidency.