China and Russia are backing Venezuela as it faces a US blockade on its sanctioned oil tankers. US President Donald Trump keeps pressing Venezuela’s President Nicolás Maduro to quit. Trump said, "I think it’d be smart for him to do that," and warned Maduro that "if he plays tough, it’ll be the last time he’s ever able to play tough." Since Trump announced a blockade last week, Venezuelan ports have slowed tanker loading. Most tankers now shift oil only between domestic ports. Millions of barrels of oil remain stuck on ships as buyers want bigger discounts and contract changes for risky voyages. China condemned the US, calling the seizure of ships a "serious violation of international law". A China-bound tanker was intercepted near Venezuela but was not sanctioned by the US. Panama’s foreign minister said the tanker did not follow maritime rules, changed its name, and turned off its transponder while loading oil from Venezuela. China’s foreign ministry said, "Venezuela has the right to develop relations with other countries" and opposed "unilateral and illegal" sanctions. China buys about 4% of its oil from Venezuela. On Monday, Russia and Venezuela’s foreign ministers criticized US actions. Russia’s foreign ministry said ministers Yván Gil and Sergei Lavrov shared "deep concern over the escalation of Washington’s actions in the Caribbean Sea." They warned of serious regional consequences and threats to international shipping. Russia reaffirmed "full support and solidarity with the Venezuelan leadership and people." An empty supertanker, Bella 1, was found drifting near Bermuda after the US coast guard failed to intercept it. Trump accuses Venezuela of using oil money to fund "drug terrorism, human trafficking, murder and kidnapping." Since September, US strikes targeted boats claimed to carry drugs in the Caribbean and eastern Pacific, killing over 100 people, some reportedly fishermen. Venezuela accuses Washington of "international piracy" and fears regime change. On Monday, Maduro told Trump in a televised speech he would be "better off" focusing on US domestic problems rather than threatening Caracas.