A resolution aimed at preventing President Donald Trump from taking unilateral military action in Cuba was blocked by Senate Republicans on April 28. The measure, led by Virginia Sen. Tim Kaine, failed to pass, with 50 Republicans and one Democrat voting against it. Two Republican lawmakers, Susan Collins and Rand Paul, joined Democrats in the attempt to curb Trump's actions. Democrats sought to prevent military hostilities against Cuba without congressional approval, concerned that negotiations with Havana were a pretext for invasion. The Trump administration has been in talks with Cuba, but the Cuban government missed a deadline to release political prisoners. The Pentagon is preparing for a potential operation on the island. Sen. Kaine expressed optimism about Republican support but ultimately, they did not support the measure. Some GOP senators indicated they would not go against Trump. Sen. John Hoeven trusts Secretary of State Marco Rubio to handle issues in the Western Hemisphere.