President Barack Obama on Monday will celebrate at the White House what aides consider a major coup in his battle for health care reform — a new agreement by drug companies to help mitigate the cost of his initiative.According to the White House, Obama will deliver remarks at noon on the “historic agreement to lower drug costs for seniors.—The companies over the weekend announced new steps to help pay for new drug coverage for seniors receiving Medicare benefits. Meanwhile, the industry will reportedly increase certain payments to the government under programs like Medicaid.