"The United States understands that Israel needs to take actions to defend itself," said White House spokesman Gordon Johndroe.
Israeli officials know they can count on the Bush administration's support but are less sure about how an Obama administration would have reacted were they to have launched this operation after 20 January.
"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," said Mr Obama during a visit to Sderot last august. "And I would expect Israelis to do the same thing."
"Obama promised in a 2007 speech that in the first 100 days of his administration he would travel to a "major Islamic forum" to make a speech "to define our struggle".
"I will make clear that we are not at war with Islam, that we will stand with those who are willing to stand up for their future, and that we need their effort to defeat the prophets of hate and violence," he said.
Regarding Obama's planned speech, he said the violence would speak louder to many Muslims about the United States "than any words Obama could utter".
He said that Muslims' unhappiness with America's position on Israeli-Palestinian issues is one of three main sources of friction, along with US support for authoritarian governments in the Middle East and the US military campaigns in Iraq and Afghanistan."
4 days and counting..
- to the mothers, the fathers the sisters and brothers.. may Alla be with them..