President Donald Trump's tough approach to Venezuela has won broad support from Republicans and Democrats alike but the rare consensus is showing signs of strain as the crisis in the OPEC nation drags on.
Members of both parties remain in agreement that Venezuela's socialist president Nicolas Maduro must go.
They also credit the Trump administration for helping forge an international coalition recognising opposition leader Juan Guaido as the country's interim president.
But with Guaido's latest calls for uprising failing to oust Maduro, some Democrats are urging the administration to work more closely with foreign allies to choke off Maduro's cash flow and tone down its rhetoric, particularly threats of military action.
Cracks in bipartisan co-operation on Venezuela - a rare bright spot for the Republican president, who has seldom drawn support from across the aisle - came amid signs of disappointment within the administration over what many had hoped would be a turning point in the crisis.
More than three months after throwing US support behind Guaido, head of the opposition-led National Assembly, Trump now has fewer levers to help pressure Venezuela's military to abandon Maduro.
Senator Bob Menendez, top Democrat on the Foreign Relations Committee, said Washington must work harder to convince foreign partners to back multilateral sanctions against Maduro.
Few countries have matched harsh US punitive measures against Venezuela's vital oil sector and its banks.
"The sanctions that we have are unilateral. They're important," Menendez told reporters. But the United States should "internationalise" those sanctions, he said.
"Isolating Russia and Cuba, the bad actors, in Venezuela. I think that would have changed the dynamics significantly."
Most Western countries have backed Guaido but Maduro retains the support of Venezuela's major creditors Russia and China, as well as leftist regional allies like Cuba and Bolivia.
Democratic Representative David Cicilline urged legislation to bar Trump from any military action without congressional approval.
Under current laws, a US president has broad powers to order military action. With Republicans controlling the Senate, new legislation to curb that power is unlikely in the short-term.
Cicilline also said administration officials should stop making statements that could be used as "propaganda" by Maduro's supporters.
Secretary of State Mike Pompeo said on Wednesday the United States was prepared to act militarily in Venezuela "if that's what's required".
