The undecideds

Some of those currently uncommitted lawmakers have serious philosophical and moral concerns about the measure. But for many — almost none of whom can admit it publicly — the political calculus is undeniably playing a role in their decision-making process.

The trick, then, to understanding where these members will end up is to understand where they are coming from, because their malleability in the final hours will almost certainly be proportional to the precariousness of their political situation.