Latinobarómetro takes a look at religion in Latin America, with Pope Francis as the backdrop. He is facing an uphill battle to counter the decline in identification with Catholicism in the region. There is a slow downward trend, even in countries with high levels of identification. Here is the trend:
The decline is most pronounced in Central America, which we've known for a long time.
I would love to see how this correlates to ideology. The rise of leftist governments and the decline of Catholicism have occurred together but how much correlation is there? Eyeballing the list of countries suggests a complicated relationship.
It won't be long until only a bare majority of Latin Americans identify as Catholics. The authors argue that the Pope's presence is giving a boost to Catholicism but I would argue that it is too early to tell that the long-term trends provide grounds for skepticism.