"The Russians will try to take advantage of whatever divisions they can for their own benefit," the National Security Council's John Kirby said.
"Russian leadership regards developing ties with the continent as a strategic foreign policy objective," Moscow's top Africa diplomat Oleg Ozerov told Newsweek.
"I do fear that there will be more cracks and the divides will be even deeper," Polish Ambassador to the U.S. Marek Magierowski told Newsweek.
One European diplomat told Newsweek that militant and separatist groups have "rushed to reorganize themselves and enter Iranian territory" amid the protests.
Two senior SDF officials warned that U.S. criticisms of Turkey's plans to launch a new ground war in Syria were not enough "to deter the Turks."
The Chinese Embassy's Liu Pengyu told Newsweek U.S. nuclear moves "gravely undermine global strategic stability and international peace and security."
The latest China Military Power report released by the U.S. military assesses China fields 300 intercontinental ballistic missiles, twice as many as last year.
Russian Ambassador Anatoly Antonov told Newsweek that Ukraine is "trying to provoke a direct military clash between the Russian Federation and NATO."
"To have a less robust relationship would give the U.S. less leverage," Jonathan Cohen, Biden's former ambassador to Egypt, told Newsweek.
"For North Korea, it would be a great thing if the new cold war system comes into play," researcher and former military policy advisor Yang Uk told Newsweek.
The Polish National Defense Ministry told Newsweek "we are verifying and checking the information regarding the incident in Przewodów."
Chinese President Xi Jinping told his U.S. counterpart Joe Biden that Taiwan is "the first red line that must not be crossed in China-U.S. relations."
"We have been very open about the fact that we have channels to communicate with Russia on managing risk," the National Security Council told Newsweek.
"Just to be clear, our policy is not containment," a senior Biden administration official said.
Asked if Republicans may try to derail President Biden's foreign policy ahead of the 2024 race, expert Mark Cancian told Newsweek, "that's called politics."
Senior U.S. administration officials said President Biden will discuss Taiwan tensions and the war in Ukraine during summits in Cambodia and Indonesia.
Algeria has reportedly become the latest nation to apply to join BRICS, following applications by Argentina and Iran and interest from several other countries.
As 185 nations condemned U.S. sanctions on Cuba, FM Bruno Rodríguez Parrilla told Newsweek that "President Biden could change this situation with a signature."
Russian Ambassador Anatoly Antonov told Newsweek that "risks posed by biological agents" are "on a par with nuclear and chemical proliferation."
"Ukraine is becoming a laboratory for the quality of the strategic weapons of Iran. I'm sure they will improve," ex-IDF military-political head Amos Gilad said
Russian Foreign Ministry cyber chief Artur Lyukmanov warned Newsweek of "full-fledged interstate confrontation" with "the use of conventional means of warfare."
Responding to Newsweek, the National Security Council's John Kirby said "there is greater concern" now that three top U.S. rivals appear to be working together.
"Pakistan and India are nuclear weapons states and the situation in Jammu and Kashmir is very, very turbulent," Ambassador Masood Khan told Newsweek.
"Any nuclear attack by North Korea against the United States or its Allies and partners is unacceptable and will result in the end of that regime."
"Today, we see active targeting and nefarious discussions in all corners of the dark web and chat rooms," former DHS CISA head Brian Harrell told Newsweek.
"The [war] in Ukraine is exposing the flaw in deterrence theory, revealing the truth that large nuclear arsenals do not make the world a safer place."
"We are not going to tolerate a situation where military threats are mounting on Russian borders," Ambassador Anatoly Antonov told Newsweek.
"We urge the American public to reflect on this question: Is this price too high to settle political scores with us?" Ambassador Anatoly Antonov told Newsweek.
Two senior Israeli military officers revealed to Newsweek how the new "Identify & Alert System" is giving the IDF an edge in the "digital arms race."