1)
Why does it say "Ki Yomar?"?
1.
Rashi: [Because he says so,] this is why he is haughty.
2.
Malbim: This is why he does not think that he is only Hashem's staff (for he thinks that he is so strong).
2)
To whom does he say so?
1.
Radak #1: He says in his heart.
2.
Radak #2: He says to his nation.
3)
What is the meaning of "Sarai Yachdav Melachim"?
1.
Radak #1: (How can a city or kingdom stabd in front of me?) Every one of my officers is esteemed like s king! Each has a great nation and army.
2.
Radak #2: Sarai are kings, i.e. of nations that he conquered.