Question

Why did Senator Wayne Morse oppose the Gulf of Tonkin Resolution?

He was against military action of any kind.
He supported Vietnamese nationalism.
The resolution gave President Johnson war-making powers without a declaration of war.
He was troubled that South Vietnam did not sign the resolution.

Answer 1

The answer to the question above is the resolution gave President Johnson war-making powers without a declaration of war.
Senator Wayne Morse opposed the Gulf of Tonkin Resolution because the resolution gave President Johnson war-making powers without a declaration of war. According to him, the resolution violates the Article One of the United States Constitution.