Obama also assailed Bush on the issue during the presidential campaign.
In March, he vowed not to use signing statements to disregard parts of laws because he disagrees on policy grounds, but only when he strongly believes provisions are unconstitutional.
“There is no doubt that the practice of issuing such statements can be abused. Constitutional signing statements should not be used to suggest that the president will disregard statutory requirements on the basis of policy disagreements,” wrote Obama.
But he has issued a series of signing statements since, though not nearly as many as Bush.