The White House national security adviser claimed three top Venezuelan officials have defected, but none have announced a switch.
"Are we gonna be a hemisphere dominated by China, Russia and dictators?" GOP Representative Adam Kinzinger asked. "Or are we going to be a hemisphere dominated by freedom and democracy?"
Venezuela's Bolivarian National Guard clashed with opposition forces in what appeared to be the greatest challenge to President Nicolás Maduro's ruling United Socialist Party since a previous coup attempt in 2002.
"You have seen the Maduros around the world who just cling to their power, no matter how they treated their own people. And it's just time for him to go," said Kellyanne Conway.
Russian President Vladimir Putin's spokesperson said that the Security Council "paid much attention to the situation in Venezuela in light of the news about an attempted coup."
Juan Guaidó, Venezuela's self-declared interim president, released a video from an air base near Caracas calling on Venezuelans to help topple President Nicolás Maduro.
Sources with knowledge of the plan say Blackwater's Erik Prince wants to send up to 5,000 Spanish-speaking troops into Venezuela.
Russian Deputy Foreign Minister Sergei Ryabkov said the new measures are illegal.
Venezuela's political and economic crisis has led to a massive uptick in cocaine-carrying flights.
The group of 12 politicians asked Donald Trump to use Washington's influence within the Organization of American States to prevent Bolivian President Evo Morales from running for another term.
"A criminal plan is underway to attack Venezuela militarily!" Venezuelan Vice President Delcy Rodriguez tweeted.
"Such behaviors are really beneath their dignity," China's Foreign Ministry spokesperson said. "Mr. Pompeo might as well take a break."
The West's way of doing things is "losing its attractiveness and is no more viewed as a perfect model for all," Russian Foreign Minister Sergey Lavrov said.
"Maduro and his cronies ought to know that President Trump is very serious when he says all options are on the table," national security adviser John Bolton said.
Secretary of State Mike Pompeo said only a day ago that "the United States has its responses being prepared" to the 100 Russian military personnel who arrived late last month in Venezuela.
Syria and Venezuela said they faced the same enemy, as Russia supports them in the face of U.S.-led regime-change efforts.
Democratic Representative Tulsi Gabbard, a 2020 presidential candidate, accused CNN's Fareed Zakaria of trying to goad President Trump into war over Russia's intervention in Venezuela.
Russia's top diplomat felt it was "insolent" for the U.S. to warn only Western countries could be involved in the West when the Pentagon maintained more bases abroad than all other countries combined.
This is a conflict between the people, who want freedom, and a tyrant.
Russia's state-run Rostec conglomerate will train Venezuelan pilots to use modernized military helicopters at a time when tensions with the U.S. run high.
Russia said "it would be nice to know" what U.S. military advisers were doing in Colombia and why President Donald Trump wants Venezuela's other neighbor, Brazil, to join NATO.
Russian troops will remain in the country "as long as they need it, and as long as the Venezuelan government needs them," Foreign Ministry spokesperson Maria Zakharova told reporters.
Worsening U.S.-Russia ties, the collapse of international arms treaties and Washington's heightened intervention in the Middle East have elicited memories of the Cuban Missile Crisis.
Two Russian air force planes landed near the capital city of Caracas with about 100 soldiers aboard, and U.S. officials believe the group included cybersecurity experts.
China said it "would like to work with the international community to help Venezuela restore stability at an early date," just as Russian military personnel and equipment showed up in Caracas.