A patient presents with severe salt-sensitive hypertension,…

A patient presents with severe salt-sensitive hypertension, hypokalemia, and suppressed plasma renin-angiotensin-aldosterone system (RAAS) activity. Genetic testing confirms a gain-of-function mutation in ENaC. Based on this diagnosis, known as Liddle’s Syndrome, which of the following is the most direct and primary mechanism by which the observed hypokalemia develops?