Sen. Martin Heinrich, the top Democrat on the Senate Energy and Natural Resources Committee, is investigating whether the Trump administration adequately planned for the effective closure of the Strait of Hormuz. Heinrich has written to Energy Secretary Chris Wright, asking questions about how the administration prepared for the closure. This comes as Iran continues to control the strait and the U.S. begins to block Iranian ports in an attempt to pressure the country to allow tankers to pass through. The administration has been criticized for not adequately planning the closure, which could result in increased energy costs and global economic turmoil.