Your rental contract is between you and the landlord. Unless you have seen to it that there are special provisions regarding the event of a foreclosure, there is most likely not much you can do. I would start off by looking for another place to live. Some here may advise you to do things like squat or stop paying rent, etc… That is a personal decision for you. Perhaps it is wise to talk to attorney on this one. Again, let me repeat, when you signed the lease it was between you and the landlord, not you and the lender. If you stop paying rent then the landlord will have whatever recourse any landlord would have. Once your original lease reached the expiration period you then converted to a month to month lease but are still bound by the same provisions regarding rent payments, etc…
As far as confronting him, there certainly is no harm. Simply ask him what he plans to do as the foreclosure moves along. I wouldn’t trust what he says, but you can certainly ask.