Maryland's Attorney General is now involved in a lawsuit against the Trump Administration. It challenges the decision to "roll back" the Endangered Species Act.
Brian Frosh joined a group of 18 attorneys general and the City of New York in filing the lawsuit.
They argue three new rules that take effect today undermine the act and will make it more difficult to protect wildlife.
The ESA was enacted under the Nixon Administration in 1973.
It's protected species like the bald eagle, grizzly bear and humpback whale.
The Trump Administration believes the new rules will improve the law's enforcement.
