The Boston Globe is reporting lawmakers and human rights activists are sharply criticizing President Bush for issuing a signing statement that they said has undermined congressional efforts to pressure the Sudanese government over the situation in Darfur. The act authorizes state and local efforts to divest from certain companies with business ties to Sudan. The Bush administration opposed the legislation alleging that it would undercut the President’s constitutional powers over foreign affairs. Bush signed the bill into law and then asserted in a signing statement that the act was unconstitutional. Meanwhile, the UN’s special envoy to Darfur has warned the situation in Darfur risks spiraling into a full-scale war. Up to 12,000 refugees have fled the Darfur region to neighboring Chad after Sudanese government aircraft, army and militia attacked three towns on Friday.