White House national security adviser Jake Sullivan called competition with China a top concern as President Biden hands the reins to President-elect Trump. He said the meeting takes place during a “critical moment between the US and China” and will “ensure that we don’t run into any problems in the next two months in this transition of power.”

President-elect Donald Trump and President Joe Biden met at the White House this week. Biden congratulated Trump on his victory. It’s the first time the two have seen each other since they met earlier this year for a debate.

When President Joe Biden’s aides were planning his visit to South America this week for a pair of leaders’ summits, two vastly different scenarios were in play.