Republican Mitt Romney's presidential campaign suffered a blow today after a video surfaced showing him telling wealthy donors that 47% of all Americans "believe they are victims" entitled to help from the government.
Mr Romney offered no apologies, conceding the comments were not "elegantly stated" and were "off the cuff".
The presidential nominee said the remarks showed a contrast between President Barack Obama's "government-centred society" and his belief in a "free-market approach".
"Of course, I want to help all Americans, all Americans, have a bright and prosperous future," Mr Romney told an impromptu news conference.
Mr Obama's campaign pounced on the video, which was obtained by the magazine Mother Jones and released only hours after Romney's campaign outlined a new strategy to try to rejuvenate a struggling campaign.
The video's emergence came as advisers to the former Massachusetts governor tried to reassure party leaders and donors about Mr Romney's strategy amid concerns that the race could be slipping away.
In the video, recorded at a Florida fundraiser in May, Mr Romney is shown saying: "There are 47% of the people who will vote for the president no matter what.
"There are 47% who are with him, who are dependent upon government, who believe that they are victims, who believe that government has a responsibility to care for them, who believe that they are entitled to health care, to food, to housing, to you name it."
Mr Romney said in the video that his role "is not to worry about those people. I'll never convince them they should take personal responsibility and care for their lives".
In a seven-minute news conference before a fundraiser near Los Angeles, Mr Romney did not dispute the authenticity of the hidden-camera footage, but he called for the release of the full video, instead of just the clips posted online.
He sought to clarify his remarks but did not apologise when a reporter asked if he was concerned that he may have offended people.
He said: "It's not elegantly stated, let me put it that way. I was speaking off the cuff in response to a question. And I'm sure I could state it more clearly in a more effective way than I did in a setting like that."
About 46% of Americans owed no federal income tax in 2011, although many of them paid other forms of taxes.
More than 16 million elderly Americans avoid federal income taxes solely because of tax breaks that apply only to seniors, according to the non-partisan Tax Policy Center.
The video was the latest headache for Mr Romney's campaign, which has tried to focus attention on a weak economic recovery and make the case that the Republican's business background would help spur the economy.
In recent weeks, it has dealt with the fallout from Clint Eastwood's rambling conversation with a chair at the Republican convention and Mr Romney's omission of the war in Afghanistan or thanks to the troops in his convention speech.
The eruption of violence in Egypt and Libya last week prompted Mr Romney to issue a statement assailing the Obama administration before it was known that an American ambassador and three other US citizens had died in Libya, a move that generated criticism from Democrats and Republicans alike.
A series of polls have shown Mr Obama with an edge nationally and in key battleground states, leading Republicans to implore Mr Romney to give voters more specifics on how he would govern. The new approach aims to improve Mr Romney's standing in the lead-up to the first presidential debate on October 3.
Obama campaign manager Jim Messina quickly issued a fundraising appeal based on the video, telling supporters: "If we don't come through for President Obama right now, this will be the guy making big decisions that affect us and our families every single day."
An Obama adviser said the Democratic campaign might use Mr Romney's comments from the fundraising video in television advertisements.
Mr Romney's campaign released a separate television advert, arguing that the president's policies "are making it harder on women".
It cited unemployment and poverty statistics for women in an attempt to close the gender gap that has shown women favouring Mr Obama.