WASHINGTON (CNN) -- The Senate Foreign Relations Committee will take up a bipartisan authorization bill Wednesday for the use of force in Syria, sources told CNN.
The resolution, which limits the authorization to 60 days with an option for an additional 30 days, was revised to address some of the concerns expressed during a Senate committee hearing Tuesday.
At the hearing, top U.S. officials faced tough questions from senators about plans for military strikes as House leaders lined up behind President Barack Obama's call to punish Syria for an August poison gas attack near Damascus.
Afterward, Foreign Relations Chairman Robert Menendez, D-New Jersey, said he and the committee's ranking Republican, Tennessee Sen. Bob Corker successfully negotiated a revised bill.
According to a copy of that text, provided to CNN by a legislative source, the bill limits the authorization to 60 days with an option for an additional 30-day deadline. It also makes clear there would be no U.S. boots on the ground.
"Together we have pursued a course of action that gives the President the authority he needs to deploy force in response to the Assad regime's criminal use of chemical weapons against the Syrian people, while assuring that the authorization is narrow and focused, limited in time, and assures that the Armed Forces of the United States will not be deployed for combat operations in Syria," Menendez said.
"With this agreement, we are one step closer to granting the President the authority to act in our national security interest," he added.
Secretary of State John Kerry, Defense Secretary Chuck Hagel and Gen. Martin Dempsey, the chairman of the Joint Chiefs of Staff, appeared before the Senate Foreign Relations Committee as the Obama administration lobbied Congress to authorize military action against Syria. From the outset, Kerry addressed the shadow of claims offered in the buildup to the 2003 invasion of Iraq, reassuring committee members that the intelligence linking Syrian government forces to the August 21st attack was solid.
"We are especially sensitive, Chuck and I, to never again asking any member of Congress to take a vote on faulty intelligence," said Kerry, who like Hagel, voted as a senator to authorize the Iraq invasion. "And that is why our intelligence community has scrubbed and re-scrubbed the evidence. We have declassified unprecedented amounts of information, and we ask the American people and the rest of the world to judge that information."
Kerry said that intelligence includes the trajectory of the rockets used to deliver the gas, Syrian military instructions to troops to don gas masks and concerns by top Syrian officials that U.N. inspectors would discover evidence of the attack.
"Not one rocket landed in regime-controlled territory -- not one," Kerry said. "All of them landed in opposition-controlled or contested territory."
Kerry said Obama isn't asking the United States to go to war -- just "to degrade and deter" the capacity of Syrian President Bashar al-Assad to launch another chemical attack. But he and Hagel faced tough questions from senators concerned that giving the administration the green light to attack Syria would draw the United States into that country's civil war, now 2 1/2 years old.
"Americans are understandably weary after the fiasco in Iraq and over a decade of war," said Sen. Tom Udall, D-New Mexico. "How can this administration make a guarantee that our military actions will be limited? How can we guarantee that one surgical strike will have any impact other than to tighten the vise grip that Assad has on his power, or allow rebels allied with al Qaeda to gain a stronger foothold in Syria?"
Kerry said the administration has no intention of sending American ground troops to Syria "with respect to the civil war." But he opposed any effort to put a ban on deploying ground forces into a congressional resolution authorizing military action, leaving open the possibility that U.S. troops may have to seize chemical weapons "in the event Syria imploded" or if extremist groups were poised to obtain them.
Secretary Hagel said any military action "would be limited in duration and scope," and won't be aimed at settling the Syrian civil war by force. He testified that the administration's proposal would not authorize strikes outside Syria, against any other government or against non-state groups.
"There are always risks in taking action, but there are also risks with inaction," he said. "The Assad regime, under increasing pressure by the Syrian opposition, could feel empowered to carry out even more devastating chemical weapons attacks. Chemical weapons make no distinction between combatants and innocent civilians, and inflict the worst kind of indiscriminate suffering, as we have recently seen."
And Kerry warned that a failure to act would undermine American alliances, encourage other U.S. adversaries like Iran and North Korea and encourage al-Assad to use chemical weapons again.
U.S. officials have said the August 21 attack left more than 1,400 dead, and Obama said Tuesday that more than 400 of those were children. Syria denies government troops were behind the attack, arguing that they were the victims of a rebel chemical attack.
Syria's U.N. ambassador, Bashar al-Jaafari, told CNN's Christiane Amanpour that the allegations of poison gas use by his government "are false and unfounded." Al-Assad told the French newspaper Le Figaro on Monday that an attack on his country risks a regional war.
Administration officials and Obama himself have said the president has the authority to conduct military strikes even without congressional approval. But asked what the administration would do if Congress refused to authorize military action, Kerry said, "We're not contemplating that, because it's too dire."
The session was interrupted early on by a member of the anti-war group Code Pink, who shouted "The American people do not want this" as she was dragged out of the room by police.
Kerry first became famous decades ago as a former Navy officer testifying against the war in Vietnam in front of the same committee. He responded to the protest by saying that "Congress will represent the American people, and I think we all can respect those who have a different point of view."
Weapons inspectors from the United Nations are analyzing samples taken from the scene last week, but their results aren't expected to assign blame. The United States and its allies say the rebels have no capability to carry out a large-scale chemical weapons attack, however.
Earlier Tuesday, the leaders of both parties in the House of Representatives emerged from a White House meeting earlier Tuesday to support Obama's call for American strikes.
House Speaker John Boehner, R-Ohio, told reporters the use of poison gas was "a barbarous act" to which only the United States is capable of responding. House Minority Leader Nancy Pelosi, D-California, added that Washington must respond to actions "outside the circle of civilized human behavior."
But in a written statement later, Boehner said it is up to Obama "to make his case to the American people and their elected representatives" -- including securing support from individual members.
"All votes authorizing the use of military force are conscience votes for members, and passage will require direct, continuous engagement from the White House," the speaker said.
No vote is scheduled before Congress returns from its summer recess on Monday. Kerry defended the delay to seek congressional authorization, saying the move gives the United States time to make its case while adding pressure on al-Assad.
"This is working," Kerry said. "There are defections taking place. There's great uncertainty in Syria. We are building support, a greater understanding, and I would far rather be playing our hand than his at this point in time."
Most of the focus of administration lobbying has been on the House. In the Senate, a Democratic source familiar with Majority Leader Harry Reid's thinking told CNN that Reid is confident any authorization measure will pass his chamber. The source said it is likely 60 votes will be needed to overcome a filibuster, and Reid thinks the votes are there.
The United Nations has said more than 100,000 people -- including many civilians -- have been killed in Syria since a popular uprising spiraled into a civil war in 2011. Syrian opposition activists reported another 107 dead on Monday, mostly in Damascus and its suburbs.
New U.N. figures Tuesday point to the staggering impact the war has had on the nation. The number of Syrians who have fled their war-ravaged country has risen above 2 million, the U.N. refugee agency reported, an increase of nearly 1.8 million people over the past 12 months.
But at the United Nations, Secretary-General Ban Ki-moon urged Security Council members to await test results on the samples collected by U.N. inspectors.
"We should avoid further militarization of the conflict and revitalize the search for a political settlement," Ban said. "I take note of the argument for action to prevent further uses of chemical weapons. At the same time, we must consider the impact of any punitive measure on efforts to prevent further bloodshed and facilitate a political resolution of the conflict. The turmoil in Syria and across the region serves nobody."
He urged member states to work through the Security Council, where Syrian allies Russia and China are expected to block any call for military action.
"The Security Council has a duty to move beyond the current stalemate and show leadership," Ban said. "This is a larger issue than the conflict in Syria. This is about our collective responsibility to humankind."