-It says “you have done unwisely… else the Lord would have established your kingdom over Yisroel forever". Shmuel talking to Shaul after he sinned.
-This means they could have retained kingship over the children of Rochel (Ephraim, Menasha and Binyomin).
-Yehuda has the traits of real malchus and would have controlled the children of Leah and the Shifchas (Bilah and Zilpah)
-Meaning the tribes of Dan, Naftali, Gad, and Asher were in the middle and would have been split to the side of Yehuda because he had more connection to the position of king.