A 27-year-old male has had a hard to control hypeension for 2 years. He is taking clonidine, hydrochlorothiazide, verapamil, and lisinopril. His blood pressure is 170/105 mmHg, pulse 90 beats/min, and respirations 16/min. The cardiopulmonary exam is normal. Pedal pulses are intact and there is no edema or mis-distribution of fat. Laboratories show potassium of 2.7 mEq/L, BUN 20 mg/dL, creatinine 1.2 mg/dL, bicarbonate 33 mg/dL, and fasting glucose 98 mg/dL. What is the most likely diagnosis?
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