Supporting Disabled National Guardsmen Act

This bill expands benefits for National Guard members injured during State active duty (like responding to disasters). It adds "State active duty" to the definition of qualifying service for retirement pay based on disability, and requires the military to adjust retirement pay if it duplicates other federal or state disability benefits. It also creates new eligibility for VA healthcare to treat disabilities incurred during State active duty, with rules requiring exhaustion of other insurance claims before VA coverage applies. These changes directly affect National Guard members who become disabled while serving under state authority, not federal deployment.