Robert Baldwin proposes a solution to the SSM stalemate. As I understand it, he suggests that an increase in imports by itself should not be enough to trigger the safeguard. Rather, you should look at the level of import consumption as well, and only impose the safeguard when import consumption is significant. This acts as a proxy for determining whether domestic producers are being injured by the increase in imports (an actual injury test would be hard to manage in these situations, the argument goes). Makes sense to me, but I don't know if it can bridge the political divide.