The senator is seeking to hold a hearing to investigate United's decision to walk away from the deal, a person close to his plans said.
Some Republican senators sought to minimize the impact of the disclosure.
Senators today sought to promote competing ideas for how to end the trial.
And, although the "should cost" measure survived 1985, the Senator sought its repeal in 1986.
In the agreement, the Senators also sought to clear the way for several other bills that have been stalled.
All 14 Democratic senators whose terms expire this year are seeking re-election.
The senators sought to send the measure back to conference for a last attempt to salvage part of the program.
The senator sought to console distraught workers, saying she, too, felt betrayed.
The Senators had sought to limit debate on the more than 70 outstanding amendments.
Those senators not wounded or dead had sought cover.