WATCH: National security advisor Jake Sullivan takes questions at White House briefing

National Security Adviser Jake Sullivan spoke Tuesday morning about the upcoming global summits and highlighted the fact that neither Russia nor China will be in attendance at the leader level.

Watch Sullivan’s remarks in the video player above.

Speaking at the White House briefing, Sullivan went on to say that the U.S. and Europe will “be there, energized and united at both the G20 and COP26 driving the agenda, shaping the agenda as it relates to these significant international issues.”

President Joe Biden leaves Biden leaves Thursday for the G20 summit in Rome, followed by the U.N. Climate Summit COP26 in Scotland.

The national security adviser said preparations are underway for a virtual meeting between Biden and Chinese President Xi Jinping “before the end of the year.”

Sullivan appeared to place the blame for the meeting not being in person on Xi, saying, “He’s chosen not to leave China at all in calendar year 2021 to see any leader. That’s of course, his choice. So, we are, I’m not going to characterize the decision making he’s making.”

“President Biden does believe it’s important that he have the opportunity to have a face to face engagement with Xi Jinping and if it’s not possible in person because of Xi’s travel constraints, doing it by virtual meeting is the next best thing,” Sullivan said.

Sullivan brushed off any concerns that Biden’s credibility with the global community will be impacted if he doesn’t reach a deal with Congress this week on his agenda, including climate change provisions that he has pledged to pass.

“I think you’ve got a sophisticated set of world leaders who understand politics in their own country and understand American democracy, and recognize that working through a complex, far reaching negotiation on some of the largest investments in modern memory in the United States, that that takes time,” he said.

Sullivan also talked about the annual summit of Southasian leaders that took place Tuesday without Myanmar amid a diplomatic standoff over the exclusion of the leader of the military-ruled nation from the group’s meetings.

He said the U.S. “will continue to stay focused on (its) steadfast support for the people of Burma, for a democratic path in Burma and for the protection of the safety, security and human rights of the citizens of that country.”

ASEAN’s refusal to allow Senior Gen. Min Aung Hlaing to represent Myanmar at the summit was its harshest rebuke yet of the country’s military rulers since they ousted civilian leader Aung San Suu Kyi in February.