Senate Armed Services Chairman Roger Wicker is planning soon to hold the first public oversight hearing of the Iran war with top US Department of Defense officials testifying, CNN has learned.

The Pentagon and National Security Council significantly underestimated Iran’s willingness to close the Strait of Hormuz in response to US military strikes while planning the ongoing operation, according to multiple sources familiar with the matter. President Donald Trump’s national security team failed to fully account for the potential consequences of what some officials have described ...