Jim Cramer: Here's the most important thing Nvidia's CEO must address tonight

CNBC's Jim Cramer warned Nvidia CEO Jensen Huang that he must address the elephant in the room on Wednesday night's post-earnings conference call. Actually, two elephants: Amazon and Alphabet . And, make no mistake about it, these two hyperscalers are encroaching on Nvidia's turf with their in-house custom artificial intelligence chips. Huang must play offense, not defense, Cramer said on "Squawk on the Street," just hours before Nvidia reports its fiscal 2027 first quarter. …