The recent escalation has been fuelled over claims over Jerusalem, which both sides see as their capital.
"We have serious concerns about the situation, including violent confrontations that we've seen over the last few days," White House press secretary Jen Psaki said on Monday, hours after Hamas militants fired rockets into Israel.
"There's still a fair distance to travel to close the remaining gaps," Biden's national security adviser Jake Sullivan said Sunday.
The Fox News anchor pointed out that Biden was "just as confident back in 2011 about pulling all U.S. forces out of Iraq."
The U.S. has helped create its most formidable adversary.
"The United States and the rest of the world will not accept a circumstance in which we do not have an effective public health surveillance system, with an international dimension, in China and across the world going forward," said Jake Sullivan, Biden's NSA nominee.