While all the legalization talk from some of Mexico's most prominent politicians in recent days, it almost seemed as though legislation to that effect was imminent. Alas, reality intervened yesterday, with a handful of PAN congressmen coming out against the idea. However, the arguments they used to support their opposition were striking; rather than voicing worries about the children or the nation's values, there were questions about Mexico legalizing before the US, or what kind of reaction it would provoke from criminal groups. In short, they were (from what I read) more practical than moral, which suggests that they would be more open to modification in the future.
More on this issue from Boz.