Does he know about the line in the first place? He has inherited the habit of putting the foot in the mouth from his parents. Remember Rajeev Gandhi's (in)famous "Naani yaad dila denge" and Sonia's arrogant "Oh yes, we have 272"? He is just estending the family trait.
As a campaigner and as a politician as well as heir apparent, he is pathetic, novice and out of depth. If he is all the Congress has to offer and if he is the star camaigner his party makes him out to be, well God help congress.