President Joe Biden didn’t answer questions reporters shouted about the Chinese surveillance balloon as he left the White House and boarded Marine One shortly after 1 p.m. Friday.

Biden has yet to publicly comment on the balloon since it was confirmed to be flying over the continental U.S. by officials on Thursday.

Biden is heading to Philadelphia, where he and Vice President Kamala Harris will appear at an infrastructure event in the afternoon and then later will speak at the Democratic National Committee's winter meeting.

Staff to the so-called "Gang of 8" received a classified briefing on the balloon by the administration Thursday afternoon, according to multiple congressional officials.

The "Gang of 8" refers to the group of congressional leaders who are briefed on classified intelligence matters. House Speaker Kevin McCarthy, R-Calif., requested a meeting with the group on Thursday.

"China's brazen disregard for U.S. sovereignty is a destabilizing action that must be addressed, and President Biden cannot be silent," McCarthy said.

It's unclear if the classified briefing for the staff is a precursor to their bosses being briefed. No meeting appears to be on the books so far.

-ABC News' Trish Turner

After saying the Chinese surveillance ballon was headed eastward, Pentagon press secretary Brig. Gen. Patrick Ryder said the balloon is "maneuverable."

"So, the balloon is maneuverable. Clearly, it's violated U.S. air space, and again we've communicated that fact to the PRC," Ryder said.

"The balloon has changed its course, which is why we are monitoring it. That is as specific as I can get," he said, not giving further details on how it could be maneuvered.

"We continue to assess and make appropriate decisions based on how we are going to address what we perceive as a potential threat," Ryder added. "The safety and security of the American people is paramount. At this time we assess it does not pose a physical threat to people on the ground."

Pentagon press secretary Brig. Gen. Patrick Ryder confirmed Friday that shooting down the balloon was considered.

"In terms of the discussions about whether or not to shoot down this balloon, that was an option. That was something that was taken into consideration," Ryder said. "Again, because we assessed that currently it does not pose a physical or military risk to people on the ground, for now we are continuing to monitor and review options."

Ryder said because of the "size" of the balloon, "any potential debris field would be significant and potential cause civilian injuries or deaths or significant property damage."

Ryder was asked multiple times if the U.S. will shoot down the balloon once it's over a body of water.

"We are monitoring the situation closely, but beyond that I will not have any additional information," he said.

When asked how close President Joe Biden was to ordering a shootdown of the balloon, Ryder said he "will not get into internal discussions with the White House."

A senior State Department official said the U.S. was still dedicated to keeping lines of communication with China open despite postponing Secretary Antony Blinken's visit.

"The secretary was prepared to depart for Beijing tonight to take on a wide-ranging agenda," the official told reporters. "We have noted the PRC statement of regret, but the presence of this balloon in our airspace is a clear violation of our sovereignty as well as international law. And it is unacceptable it has occurred."

"After consolations with our interagency partners, as well as with Congress, we have concluded that the conditions are not right at the moment for Secretary Blinken to travel to China," the official added.

The official said Blinken has indicated he will visit China when conditions allow, but did not stipulate what those conditions would have to be.

They also said talks with Beijing would continue across multiple levels of government and that Blinken had been in touch with his Chinese counterpart Friday morning.

"We will maintain open lines of communication with the PRC to address our concerns about this ongoing incident and to responsibly manage the competition between our countries," the official said.

Asked whether the department believed China's explanation of the balloon's purpose and how it happened into American airspace, the official said, "We remain confident in our assessment of the situation."

-ABC News' Shannon Crawford