In a blow to President Bush, two major unions, the United Auto Workers and the International Brotherhood of Electrical Workers have publicly come out opposing the massive energy bill before the Senate. The Teamsters Union last weekend also withdrew its support for the legislation. Meanwhile a Democrat-led filibuster may block the bill which represents the largest overhaul of US energy policy in a decade. Among other things the bill would shield from lawsuits the makers of the gasoline additive MTBE which contaminates water supply. The bill also gives out nearly $26 billion in tax subsidies to the energy industry.