1)
Why does it say "Asher Chashvu"?
1.
Radak: They have evil thoughts in the heart.
2.
Malbim: Refer to 140:2:2:2.
2)
What is the meaning of "Yaguru Milchamos"?
1.
Rashi: There will be wars in their Megurim (residences).
2.
Radak: They say their evil thoughts with the mouth. "Yaguru" is gathering, like "Yegorehu v'Chermi" (Chabakuk 1:15). They tell Sha'ul, you will find him in this place. Go fight him! They constantly tell him so.
3.
Malbim: Refer to 140:2:2:2.