After a week of the debate, it seems all but inevitable that the most impressive and far-reaching bill to make it to the floor of the US Senate will die a slow and sad death in filibuster.

Even the bill’s staunchest supporters say it’s unlikely they’ll be able to rally the 60 votes needed to break the current roadblock set-up by Senate Republicans. Despite the co-sponsorship of John Warner, a Virginia Republican, only 6 GOP members pledged their support to the measure.

Environmental legislation never seems to pass easily—the Clean Air Act Amendments of 1990 were debated for five weeks before finally passing. But opposition seemed dead set on burying the bill in unpopular amendments and delay; one senator demanded that the entire 492 page proposal be read aloud into the record on Wednesday, essentially ending debate on the bill for that day.

Senate Majority Leader Harry Reid has set a vote for Friday at noon to determine the bills fate. If it cannot muster the 60 votes needed to break filibuster, it will be removed from consideration.