True.

Police can search a private home if they have a warrant to search a house. There may be some exceptions under the Patriot Act.

There is a whole list of exceptions to needing a search warrant. This means that if they can prove that the search fit into one of the exclusions then the search is lawful. Some of the exceptions are in plain sight so if they can see it even if its when you open your door. Another is abandoned property. There is also immediate danger to society and yourself. There are also different rules for searches of car in traffic stops.

True

No exceptions.