U.S. Sen. Angus King, I-Maine, and two Senate colleagues, one Democrat and one Republican, introduced a bill Friday that would direct the federal government to examine the rapidly rising rate of children born to opiate-addicted mothers. In Maine, the number of drug-affected babies has nearly doubled from 526 in 2010 to 995 in 2015, or 1 in 12 babies born in the state. “The statistics are heartbreaking,” King said in a statement.