U.S. senators postpone climate bill unveiling

One of President Barack Obama's top priorities -- tackling global warming -- suffered a severe setback on Saturday when a fight over immigration derailed plans to unveil a compromise climate change bill. A bipartisan group of senators led by Democrat John Kerry had been aiming to outline details of their climate change bill on Monday.
That plan was canceled after Republican Senator Lindsey Graham, a member of the working group, threatened to pull out if Democrats pushed for a debate on an overhaul of immigration before doing the huge environmental and energy legislation.
Without Graham on board, efforts to pass climate control legislation could be doomed, as he was expected to work to win more Republican support for the bill. See further: Washington Post, April 24