1)
Why does it say "Ad Masai Resha'im" (the first time)?
1.
Radak: The Galus has been very long for us.
2.
Malbim (1): How long will Resha'im be found?!
2)
Why does it say "Ad Masai Resha'im Ya'alozu"?
1.
Radak: They speak haughtily over us (verse 4) - how long will this be?!
2.
Malbim (1): This is a third reason why Hashem should punish Resha'im - straightness obligates this.