The Chinese government, along with U.S. allies in Europe, continues to support a return to the 2015 nuclear deal with Iran.
"There's still a fair distance to travel to close the remaining gaps," Biden's national security adviser Jake Sullivan said Sunday.
Officials said a suspicious Sunday blackout at a major uranium enrichment facility was likely orchestrated by foreign actors seeking to disrupt Iran's controversial nuclear program.
"Symbolism is very big for Kim. Look, it's business as usual in North Korea," Jack Jacobs told MSNBC.
Americans' fears of North Korea's nuclear program and the Islamic State have both fallen significantly in the past two years of Donald Trump's presidency.
The International Atomic Energy Agency called the "further development" of Pyongyang's nuclear program a "cause for grave concern" in a report.
The Ayatollah said Muslims must resist arrogant western nations.
Foreign Minister Sergey Lavrov said the treaty "triggers strong differences between the members of the international communities."
The bill, a reaction to U.S. sanctions, will increase the country's military and intelligence budget by $800 million.
Trump said he would take a new approach to Kim Jong Un. "I would speak to him," he said.
The secretive country's leader, Kim Jong-un, takes on a new title, chairman of the Workers' Party.
The isolated country marked the 62nd anniversary of the signing of the Korean War armistice with anti-American rhetoric.