With less than 45 days left before the election, a new poll released on Sunday by Public Policy Polling gives President Barack Obama a six-point lead over Republican challenger Mitt Romney in Colorado.

PPP's latest survey finds Obama leading Romney 51-45 in Colorado. This new poll shows a three point improvement for Obama since PPP's last poll of the Centennial State over Labor Day weekend which gave him a narrow 49-46 advantage over Romney.

“We have consistently found Barack Obama leading in Colorado and that advantage is widening again as the election nears,” said Dean Debnam, President of Public Policy Polling, in a statement. “Romney’s going to need to get it turned around soon to have a chance at winning the state.”

The Huffington Post's Pollster estimate currently tracking 27 polls remains essentially unchanged from the earlier PPP poll, showing Obama leading Romney 47.7 percent to 45.6 percent in Colorado. The state is now classified as "leaning" toward Obama, a recent change from the state being considered a toss-up for either candidate. Earlier in September, Obama lead Romney 48.3-46.1:

Nate Silver's political polling analysis blog FiveThirtyEight gives Obama a solid 87.8 percent percent chance of winning in Colorado as of Sept. 24 and by November Silver's math forecasts a 68.2 percent chance of Obama winning in Colorado on Nov. 6.

Obama's lead has grown in Colorado because, PPP says, he's neutralized or pulled slightly ahead in key groups that the president has been struggling with. This latest poll finds the president narrowly ahead with white voters (49-48) and has an even stronger lead with men this cycle (51-46) -- both groups Romney held just weeks ago, when PPP last polled. Obama also continues to lead among Hispanics (65-29), independents (51-41) and women (52-44).

Romney continues to hold a healthy lead among seniors in the state (52-45), but Obama offsets that with his overwhelming lead among voters under the age of 45 (58-38).

According to PPP, Romney's "47 percent" remarks that were leaked last week have hurt the Republican's standings in Colorado with 38 percent of voters saying that his comments made them less likely to vote for him.

The survey also found differing party-line support between the candidates with a stronger percentage of Democrats supporting Obama (91 percent) to a slightly less strong percentage of Republicans backing Romney (86 percent).

Nationally Obama has opened up a larger lead over Romney as well -- HuffPost's Pollster estimate, tracking 466 polls, shows Obama leading Romney 48.7 to 44.5. This is a significant increase from just early September when the candidates were essentially at a dead heat, 46.2 to 46.1:

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  • Scott Brown

    "That's not the way I view the world. As someone who grew up in tough circumstances, I know that being on public assistance is not a spot that anyone wants to be in. Too many people today who want to work are being forced into public assistance for lack of jobs," Scott said in an email to <a href="http://thehill.com/blogs/ballot-box/senate-races/250157-sen-scott-brown-denounces-romney-comments" target="_hplink">The Hill</a>.

  • Paul Ryan

    "He was obviously inarticulate in making this point," Ryan <a href="http://www.huffingtonpost.com/2012/09/18/paul-ryan-mitt-romney-video_n_1895403.html" target="_hplink">said</a> during an interview with a Nevada television station.

  • Rush Limbaugh

    "This could be the opportunity for Romney, and for that campaign, to finally take the gloves off and take the fear off and just start explaining conservatism, start explaining liberty to people and what it means," <a href="http://www.huffingtonpost.com/2012/09/18/rush-limbaugh-mitt-romney_n_1893882.html" target="_hplink">Limbaugh said</a> Tuesday. "And explain that they don't need to be in that 47 percent. There's no reason for them, for everybody to be -- essentially having given up on their future in this country. There's no reason for it. This is, to me, such an opportunity to espouse conservatism."

  • Allen West

    "Mitt Romney probably could have better explained himself. I think he was a little clumsy in doing this," <a href="http://thehill.com/video/house/249975-rep-allen-west-romney-a-little-clumsy-with-47-percent-comment" target="_hplink">West said</a> on Fox News.

  • David Brooks

    "Sure, there are some government programs that cultivate patterns of dependency in some people. I'd put federal disability payments and unemployment insurance in this category. But, as a description of America today, Romney's comment is a country-club fantasy. It's what self-satisfied millionaires say to each other. It reinforces every negative view people have about Romney," <a href="http://www.nytimes.com/2012/09/18/opinion/brooks-thurston-howell-romney.html?ref=davidbrooks" target="_hplink">Brooks wrote</a>. "He's running a depressingly inept presidential campaign. Mr. Romney, your entitlement reform ideas are essential, but when will the incompetence stop?"

  • Bill Kristol

    "It remains important for the country that Romney wins in November (unless he chooses to step down and we get the Ryan-Rubio ticket we deserve!). But that shouldn't blind us to the fact that Romney's comments, like those of Obama four years ago, are stupid and arrogant," <a href="http://www.weeklystandard.com/blogs/note-romney-s-arrogant-and-stupid-remarks_652548.html" target="_hplink">Kristol wrote</a>.

  • Dana Loesch

  • Donald Trump

    "He has to not apologize, because we've seen enough apologizing already, and he cannot apologize," <a href="http://thehill.com/video/campaign/249993-trump-romney-cannot-apologize-for-inartful-comments-at-fundraiser" target="_hplink">Trump said</a> on NBC News. "What he said is probably what he means." Trump also said that Romney's words were "inartfully stated."

  • Erick Erickson

    "The Romney campaign should double down on what he said. They should own it. The trouble for the left and media (but I repeat myself) is that most Americans agree with Mitt Romney. Most Americans consider themselves part of the 53% and it is not a winning proposition for Barack Obama to convince Americans they are less than they think they are when most Americans already recognize he has made them less than they were," <a href="http://www.redstate.com/2012/09/17/treat-the-press-as-enemy-collaborators/" target="_hplink">Erickson wrote</a> in a blog post on RedState.com.

  • Chris Christie

    "[Romney] believes that every American has got to have skin in the game...he doesn't want what the president wants," <a href="http://www.politico.com/blogs/burns-haberman/2012/09/christie-romney-wants-to-empower-people-135893.html" target="_hplink">Christie said</a> on Fox News, adding that Romney wants to "empower individuals...and that's what he's really talking about."

  • Laura Ingraham

    "The idea that you're declaring, 'Well, the race is over. Mitt Romney doesn't care about people,'" <a href="http://www.mediaite.com/tv/laura-ingraham-fired-up-over-romneys-47-tape-its-ridiculous-this-is-getting-airtime/" target="_hplink">Ingraham said </a>on Fox News. "Meanwhile, you have a president whose policies have undermined the 47 percent. ... I'm very pumped up about this. I think it's ridiculous that people are seizing on it and that we're even giving all that much airtime to it, frankly."

  • Linda McMahon

    "I disagree with Governor Romney's insinuation that 47% of Americans believe they are victims who must depend on the government for their care. I know that the vast majority of those who rely on government are not in that situation because they want to be. People today are struggling because the government has failed to keep America competitive, failed to support job creators, and failed to get our economy back on track," <a href="http://www.lindaforsenate2012.com/news/press-releases/2012/09/18/linda-mcmahon-response-to-mitt-romneys-remarks/" target="_hplink">McMahon said</a> in a statement.

  • Jonah Goldberg

    "To read many of the reactions on Twitter, you'd think Mother Jones had just found video of Mitt Romney strangling a hooker with her own pantyhose," <a href="http://www.nationalreview.com/corner/322394/quick-thoughts-freeloaderdammerung-jonah-goldberg" target="_hplink">Goldberg wrote</a>. "Indeed, many people understand what Romney is getting at here, even if he's saying it badly."

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  • Colorado

    <strong>For more presidential and congressional polls, maps and forecasts, <a href="http://elections.huffingtonpost.com/2012/romney-vs-obama-electoral-map?hw" target="_hplink">visit HuffPost Pollster</a>.</strong>

  • Iowa

    <strong>For more presidential and congressional polls, maps and forecasts, <a href="http://elections.huffingtonpost.com/2012/romney-vs-obama-electoral-map?hw" target="_hplink">visit HuffPost Pollster</a>.</strong>

  • Wisconsin

    <strong>For more presidential and congressional polls, maps and forecasts, <a href="http://elections.huffingtonpost.com/2012/romney-vs-obama-electoral-map?hw" target="_hplink">visit HuffPost Pollster</a>.</strong>

  • Ohio

    <strong>For more presidential and congressional polls, maps and forecasts, <a href="http://elections.huffingtonpost.com/2012/romney-vs-obama-electoral-map?hw" target="_hplink">visit HuffPost Pollster</a>.</strong>

  • Virginia

    <strong>For more presidential and congressional polls, maps and forecasts, <a href="http://elections.huffingtonpost.com/2012/romney-vs-obama-electoral-map?hw" target="_hplink">visit HuffPost Pollster</a>.</strong>

  • North Carolina

    <strong>For more presidential and congressional polls, maps and forecasts, <a href="http://elections.huffingtonpost.com/2012/romney-vs-obama-electoral-map?hw" target="_hplink">visit HuffPost Pollster</a>.</strong>

  • Florida

    <strong>For more presidential and congressional polls, maps and forecasts, <a href="http://elections.huffingtonpost.com/2012/romney-vs-obama-electoral-map?hw" target="_hplink">visit HuffPost Pollster</a>.</strong>