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.
Pence wrote in an op-ed: "Maduro continues to stand in the way of Venezuela's freedom and democracy."
"I believe in an inclusive foreign policy—one that centers on human rights, justice and peace as the pillars of America's engagement in the world, one that brings our troops home and truly makes military action a last resort," Representative Ilhan Omar wrote.
Venezuela, once boosted by Hugo Chávez, suffers one of the world's worst economic crises amid a political row between President Nicolás Maduro and opposition leader Juan Guaidó.
China said it was "willing to provide assistance to the Venezuelan power system," while Russia dismissed "pointless" U.S. threats to stop buying oil from Caracas.
A "survivor of war," Representative Ilhan Omar of Minnesota is "one of the most effective voices," Alexandria Ocasio-Cortez said.
Senator Marco Rubio denied being behind the massive blackout in Venezuela, where President Nicolás Maduro vowed to defeat "American imperialism" trying to overthrow him.