Both chambers of Congress had approved a compromise measure early this month.
Sampling is a compromise measure, which can be an important management tool.
He had been expected to offer several amendments to spur a compromise measure.
Democrats renewed their call today for a compromise measure they offered earlier.
Aides in both houses said a compromise measure might be passed by the end of the year.
The compromise measure was adopted by a vote of 75 to 22.
They also decided against most of the compromise measures.
The Bill was seen as a compromise measure, and did not include proportional representation.
The $385 billion compromise measure, which President Clinton has agreed to sign, passed 296-135.