Experts warned of risks if the Wagner paramilitary group succeeded in seizing control of Russia and gaining access to its nuclear warheads.
House Speaker Kevin McCarthy, R-CA, also claimed Putin is likely feeling vulnerable after the Wagner group's insurrection.
Russian President Vladimir Putin on Monday accused Ukraine and its Western allies of wanting Russians to "kill each other" during a revolt by mercenaries of the Wagner group, which stunned the country with an aborted march on Moscow over the weekend.
The Russian President emphasized that the government would honor its promise to those Wagner soldiers who wished to go to Belarus, while others were encouraged to sign contracts with the Defense Ministry and continue their service to Russia.
The two senators said the resolution sends a message to Russian President Vladimir Putin that NATO would respond if Russia uses nuclear weapons in Ukraine.
Experts say Putin's failure to keep Yevgeny Prigozhin in check makes Russia's power structure appear weak to Chinese President Xi Jinping.
Wagner's Yevgeny Prigozhin previously accused the Russian military of bombing his war camps and killing his fighters in Ukraine.
Russia's crisis involving a mercenary group's aborted revolt against the Kremlin exposed "real cracks" in President Vladimir Putin's rule, US Secretary of State Antony Blinken said Sunday.
A royal commentator thinks Harry is "out of touch" with "reality" for allegedly thinking he could get hold of Vladimir Putin and Donald Trump for a podcast.
Russian President Vladimir Putin said Saturday morning the country faced anarchy following an armed rebellion by the leader of the Wagner militia against the Kremlin.
Russian emergency services discovered a suicide note after they found Soviet Russian nuclear physicist and thermonuclear bomb creator Grigory Klinishov dead.
The Satan-2 nuclear warhead launcher can carry 10 multiple re-entry vehicles that can be sent to hit different targets.
President Joe Biden said the threat of Vladimir Putin using tactical nuclear weapons is "real," after Russia said it has begun delivering such weapons to Belarus.
Former President Donald Trump claimed Russian President Vladimir Putin would never have invaded Ukraine if he won the 2020 election.
Russian President Vladimir Putin stuttered during a meeting with pro-Russian military bloggers.
Russian President Vladimir Putin also said the nuclear weapons serve as Moscow's "guarantee" amid the war.
The exiled Belarusian opposition leader warned of the danger of delivering Russian nuclear weapons into the hands of President Alexander Lukashenko.
Russia is not ruling out using nuclear weapons to defend itself from enemies while insisting it does not want an escalation to a nuclear war.
Yurii Ihnat, the spokesperson for Ukraine's Air Forces Command, said Russia has a shortage of missiles to use in the war in Ukraine.
A former adviser to Russian President Vladimir Putin is urging Moscow to ramp up its nuclear threats to counter the West and "save humanity."
Russian President Vladimir Putin recounted the experience in a meeting with pro-Kremlin bloggers and correspondents.
Belarusian President Alexander Lukashenko said he is prepared to use Russia's tactical nuclear weapons to protect his country from aggression.