The public is divided over whether Barack Obama should seek a second term in 2012.

Americans are divided on the question of whether scientists agree that the earth is warming because of human activity.

A majority of Republicans now say there is no solid evidence the earth is warming; three years ago, 62% saw solid evidence.

Hispanics are divided about the impact of illegal immigration on Hispanics already living in the U.S.

Among all registered voters, preferences are about evenly divided — 44% Democratic, 43% Republican. But among likely voters, Republicans lead by 6 points (48% to 42%) — one of the largest gaps in preferences between all voters and likely voters ever recorded in Pew Research Center surveys.