The Trump administration’s drive toward expanded military operations in the southern Caribbean Sea - ostensibly aimed at Venezuelan drug networks - suffered a severe blow in last week’s Senate vote. The resolution, rejected in a close 51-49 vote, exposed just how brittle Republican support for military expansion has become. The Senate vote follows weeks of rising unease about Trump’s opaque strategy in the Caribbean. Despite attempts to frame the operation as part of a renewed counter-narcotics effort, the absence of clear objectives…