The resolution, worked out in intensive negotiations by Democratic leader George Mitchell, Republican leader Bob Dole and other key senators, supported a "prompt and orderly" withdrawal of U.S. forces from Haiti.
But unlike legislation pending before the House of Representatives, the resolution sets no date for withdrawal.
The Senate was scheduled to begin its debate later Thursday.
The House legislation, expected to be voted Thursday evening, authorizes the operation -- although it has already started -- until March 1, but would allow for an extension.
Clinton, who sought and received the backing of the United Nations before taking action in Haiti, says he did not need action by Congress because he was acting under his authority as commander in chief.
Wide opposition to a U.S. invasion of Haiti probably would have led to defeat of an administration effort to win congressional advance authorization.
However, the apparent success of the operation so far and absence of American casualties has muted calls for an immediate pullout.
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