Here are a few useful votive Masses (which I have used these past few days) for the demise of a nation.
Ordinary Form
For the New Evangelization
For Persecuted Christians
Extraordinary Form
Missa Pro Paganos!
God save America and especially the illegal immigrants in our midst who quietly and nobly slave for us often in the humblest jobs with no rights, no benefits and outrageous contempt.
What happened to the Christian virtue of "harboring the foreigner!"
It continues to be a corporal work of mercy.