The largest lawyers group in the country is warning that President Bush is undermining the constitution by claiming he has the authority to ignore laws passed by Congress. A new report by the American Bar Association criticizes the president’s use of what’s known as signing statements. Since he took office President Bush has issued over 750 signing statements — more than any president ever. ABA President Michael Greco said “We will be close to a constitutional crisis if this issue, the president’s use of signing statements, is left unchecked.” Bush has used signing statements to challenge laws including a congressional ban on torture, a request for data on the USA Patriot Act, whistle-blower protections and the banning of U.S. troops fighting in Colombia.