The Host Julie RovnerKFF Health News @jrovner Read Julie’s stories. Julie Rovner is chief Washington correspondent and host of KFF Health News’ weekly health policy news podcast, “What the Health?” A noted expert on health policy issues, Julie is the author of the critically praised reference book “Health Care Politics and Policy A to Z,” now in its third edition. The Supreme Court this week took up a case brought by two herring fishing companies that could shake up the way the entire executive branch administers laws passed by Congress. At stake is something called “Chevron deference,” from t…