Some quotes from lawmakers during Tuesday's Senate hearings on Iraq, which featured testimony from Gen. David Petraeus and Ambassador Ryan Crocker:

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"This new increase in violence raises questions about the military success of the surge. But, more significantly, the purpose of the surge, as announced by President Bush last year, which was to give the Iraqi leaders breathing room to work out a settlement, has not been achieved." - Sen. Carl Levin, D-Mich.

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"Today it is possible to talk with real hope and optimism about the future of Iraq and the outcome of our efforts there. For while the job of bringing security to Iraq is not finished, as the recent fighting in Basra and elsewhere vividly demonstrated, we're no longer staring into the abyss of defeat and we can now look ahead to the genuine prospect of success." - Sen. John McCain, R-Ariz.

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"As I hear the questions and the statements today, it seems to me that there's a kind of 'hear no progress in Iraq, see no progress in Iraq, and most of all, speak of no progress in Iraq.' The fact is, there has been progress in Iraq." - Sen. Joseph Lieberman, I-Conn.

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"You mentioned that the era of our paying for major reconstruction is over. But we're continuing to pay the salaries of the Sons of Iraq in many cases. We're continuing to pay for the training and equipping of Iraqi forces. I'm told that we're even continuing to pay for fuel within Iraq. Isn't it time for the Iraqis to start bearing more of those expenses, particularly in light of the windfall in revenues due to the high price of oil?" - Sen. Susan Collins, R-Maine.

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"I just want to respond to some of the statements and suggestions that have been made ... that it is irresponsible or demonstrates a lack of leadership to advocate withdrawing troops from Iraq in a responsible and carefully planned withdrawal. I fundamentally disagree. Rather, I think it could be fair to say that it might well be irresponsible to continue the policy that has not produced the results that have been promised time and time again." - Sen. Hillary Clinton, D-N.Y.

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"I want to remark how dramatic a difference it is from today and the reports that you bring us, General Petraeus, from what we had seen when we were last together here in September. I think it's undeniable that dramatic and significant progress has been made, particularly as it relates to al-Qaida." - Sen. Mel Martinez, R-Fla.

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"And 15 months into the surge, we've gone from drowning to treading water. We're still spending $3 billion every week and we're still losing - thank God it's less - but 30 to 40 American lives every month. We can't keep treading water without exhausting ourselves. But that's what the president seem to be asking us to do." - Sen. Joseph Biden, D-Del.

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"Today, the questions are whether and how improvements in security can be converted into political gains that can stabilize Iraq, despite the impending drawdown of United States troops. Simply appealing for more time to make progress is insufficient. Debate over how much progress we have made and whether we can make more is less illuminating than determining whether the administration has a definable political strategy that recognizes the time limitations we face and seeks a realistic outcome designed to protect American vital interests." - Sen. Richard Lugar, R-Ind.

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"The problem I have is if the definition of success is so high: no traces of al-Qaida and no possibility of reconstitution, a highly effective Iraqi government, a Democratic multiethnic, multi-sectarian functioning democracy, no Iranian influence, at least not of the kind that we don't like, then that portends the possibility of us staying for 20 or 30 years. If, on the other hand, our criteria is a messy, sloppy status quo but there's not, you know, huge outbreaks of violence ... that seems to me an achievable goal within a measurable timeframe." - Sen. Barack Obama, D-Ill.

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"Certainly security is important, we understand that. But how we arrive or the Iraqis arrive at some political accommodation to sort all this out, that should be our focus. And the fact is, by any analysis, we're going to continue to see a bloody Iraq. We are going to continue to see ... an Iraq that will ricochet from crisis to crisis. And I am wondering ... if we are not essentially holding our policy captive to Iraqi developments." - Sen. Chuck Hagel, R-Neb.