 NEW YORK AP Walmart is suing the U.S. government in a pre-emptive strike in the battle over its responsibility in the opioid abuse crisis. The government is expected to take civil action against the worlds largest retailer, seeking big financial penalties, for the role its pharmacies may have played in the crisis by filling opioid prescriptions. But on Thursday, Walmart filed a lawsuit saying that the Justice Department and the Drug Enforcement Administration are blaming the company for the governments own lack of regulatory and enforcement policies to stem the crisis. Walmart says it is seeking a declaration from a federal judge that the government has no lawful basis for seeking civil damages from the company. It is also seeking to clarify its legal rights and duties under the Controlled Substance Act. Walmart operates more than 5,000 pharmacies in its stores around the country. Walmart and its pharmacists find themselves in an untenable position, the company based in Bentonville, Arkansas, says in the lawsuit filed in the U.S. District Court in the Eastern District of Texas. Under defendants sweeping view, Walmart and its pharmacists may be held liable perhaps even criminally for failing to second-guess DEA-registered doctors and refuse their prescriptions. But if pharmacists do so, they may face the wrath of state medical boards, the medical community at large, individual doctors, and patients. Walmart says in the suit that the Justice Department identified hundreds of doctors who have written problematic prescriptions that Walmarts pharmacists allegedly should not have filled. But nearly 70 continue to have active registrations with the DEA, the lawsuit says. In other words, defendants want to blame Walmart for continuing to... 