WASHINGTON — When President-elect Barack Obama went to Israel in July — to the very town, in fact, whose repeated shelling culminated in this weekend’s new fighting in Gaza — he all but endorsed the punishing Israeli attacks now unfolding.

“If somebody was sending rockets into my house, where my two daughters sleep at night, I’m going to do everything in my power to stop that,” he told reporters in Sderot, a small city on the edge of Gaza that has been hit repeatedly by rocket fire. “And I would expect Israelis to do the same thing.”

Now, Mr. Obama’s presidency will begin facing the consequences of just such a counterattack, one of Israel’s deadliest against Palestinians in decades, presenting him with yet another foreign crisis to deal with the moment he steps into the White House on Jan. 20, even as he and his advisers have struggled mightily to focus on the country’s economic problems.

Since his election, Mr. Obama has said little specific about his foreign policy — in contrast to more expansive remarks about the economy. He and his advisers have deferred questions — critics could say, ducked them — by saying that until Jan. 20, only President Bush would speak for the nation as president and commander in chief. “The fact is that there is only one president at a time,” David Axelrod, Mr. Obama’s senior adviser, told CBS’s “Face the Nation” on Sunday, reiterating a phrase that has become a mantra of the transition. “And that president now is George Bush.”

Mr. Obama, vacationing in Hawaii, talked to Secretary of State Condoleezza Rice on Saturday. “But the Bush administration has to speak for America now,” Mr. Axelrod said. “And it wouldn’t be appropriate for me to opine on these matters.” As the fighting in Gaza shows, however, events in the world do not necessarily wait for Inauguration Day in the United States.

Even before the conflict flared again, India and Pakistan announced troop movements that have raised fears of a military confrontation following the terrorist attacks in Mumbai. North Korea scuttled a final agreement on verifying its nuclear dismantlement earlier this month, while Iran continues to stall the international effort to stop its nuclear programs. And there are still two American wars churning in Iraq and Afghanistan. All demand his immediate attention.

Mr. Obama’s election has raised expectations, among allies and enemies alike, that new American policies are forthcoming, putting more pressure on him to signal more quickly what he intends to do. In the case of Israel and the Palestinians, Mr. Obama has not suggested he has any better ideas than President Bush had to resolve the existential conflict between the Israelis and Hamas, the Palestinian group that controls Gaza.

“What this does is present the incoming administration with the urgency of a crisis without the capacity to do much about it,” said Aaron David Miller, a scholar at the Woodrow Wilson Center in Washington and author of “The Much Too Promised Land,” a history of the Israeli-Palestinian peace efforts. “That’s the worst outcome of what’s happening right now.”

The renewed fighting — and the international condemnation of the scope of Israel’s response — has dashed already limited hopes for quick progress on the peace process that Mr. Bush began in Annapolis, Md., in November 2007. The omission of Hamas from any talks between the Israelis and President Mahmoud Abbas, who controls only the West Bank, had always been a landmine that risked blowing up a difficult and delicate peace process, but so have Israel’s own internal political divisions.

Mr. Obama might have little to gain from setting out an ambitious agenda for an issue as intractable as the Palestinian-Israeli conflict. But the conflict in Gaza, like the building tensions between India and Pakistan, suggests that he may have no choice. “You can ignore it, you can put it on the back burner, but it will always come up to bite you,” said Ghaith al-Omari, a former Palestinian peace negotiator.

For Mr. Obama, the conundrum is particularly intense since he won election in part on promises of restoring America’s image around the world. He will assume office with high expectations, particularly among Muslims around the world, that he will make an effort at dealing with the Arab-Israeli conflict.

Early on as a candidate, Mr. Obama suggested that he did not necessarily oppose negotiations with groups like Hamas, though he spent much of the campaign retreating from that position under fire from critics.

By the time he arrived in Israel in July, he suggested he would not even consider talks without a fundamental shift in Hamas and its behavior, effectively moving his policy much closer to President Bush’s. “In terms of negotiations with Hamas, it is very hard to negotiate with a group that is not representative of a nation-state, does not recognize your right to exist, has consistently used terror as a weapon, and is deeply influenced by other countries,” he said then.

Mr. Obama received an intelligence briefing on Sunday and planned to talk late on Sunday to his nominee for secretary of state, Hillary Clinton, and his choice as national security adviser, James L. Jones, according to a spokeswoman, Brooke Anderson.

One option would be for an Obama administration to respond much more harshly to Israel’s policies, from settlements to strikes like those this weekend, as many in the Arab world and beyond have long urged. On Sunday, though, Mr. Axelrod said the president-elect stood by the remarks he made in the summer and, when asked, noted the “special relationship” between the United States and Israel.

Otherwise, Mr. Obama could try to pressure surrogates to lean on Hamas, including Egypt, which shares a border with Gaza. He can try to build international pressure on Hamas to stop the rocket attacks into Israel. He can try to nurture a peace between Israel and Mr. Abbas on the West Bank, hoping that somehow it spreads to Hamas. All have been tried, and all have failed to avoid new fighting.

“The reality is, what options do we have?” Mr. Miller said.

Jackie Calmes contributed reporting from Honolulu.