United States President George W Bush is becoming increasingly unpopular because of his Iraq policy, the latest Wall Street Journal/NBC poll shows.

To the question whether "removing Saddam Hussein from power was worth it," voters said "no" by 51 to 40 per cent.

"Americans still believe that Saddam Hussein was a bad guy and still support the military. But the latest Wall Street Journal/NBC News poll shows most voters believe the Iraq policy has failed, increasingly mistrust the President, worry that we will stay too long, and -- even if, as they suspect, conditions worsen -- want Americans to get out sooner rather than later," the WSJ said.

"A majority of Americans," said the paper, "now believe that the Iraq war has not been worth the costs; key swing voters in this closely divided presidential race feel that even more deeply."