President Donald Trump's military intervention in Venezuela is testing his ability to hold the Republican coalition together. Concerns have emerged even as many Republicans initially backed the mission to capture Venezuelan leader Nicolás Maduro. Trump's comments about the U.S. “running” Venezuela have raised fears that he's abandoning his “America First” philosophy. Outgoing Rep. Marjorie Taylor Greene has criticized this approach, as has moderate Rep. Brian Fitzpatrick. Despite Trump's dominance in the GOP, his grip has faced challenges. Secretary of State Marco Rubio is suggesting the U.S. wouldn't manage Venezuela daily, but concerns remain about the fallout from Washington's intervention.