The BDN Opinion section operates independently and does not set newsroom policies or contribute to reporting or editing articles elsewhere in the newspaper or on bangordailynews.com. A good, durable compromise tends to leave both sides unhappy. By that measure, in an often polarized national gun debate, a recently announced Senate compromise could be a long-awaited positive step forward. Does it go as far as we’d like to see in terms of closing loopholes in the existing background check system and restricting some gun and ammunition sales?