You can say roughly the same thing as I mentioned in the last post (The only thing you should ever say to the police), but here are a few more things you should know:
Grateful Dead was right, “But if you got a warrant, I guess you’re gonna come in.” There is nothing you can do if they have a warrant. Record what you can with your phone, do not get in the way, and otherwise stay quiet after you ask for a copy of the warrant. Whether or not they give you a copy, get out of the way. It’s not like you are going to be able to object to their search as being beyond the scope of the warrant or not based on sufficient probable cause. You just have to save that argument for court. But be sure to save it. Do not consent to anything.
If they do not have a warrant, you do not have to speak with them. Refer back to the linked post above. If you DO talk to them, do not let them inside your house. Anything they see inside the door can be used as pretext for a search. Step outside to speak with them and close the door behind you. If you have open curtains, close them before you open the door.
Remember, there is nothing more American than exercising your natural rights as protected by the Constitution. Be proud to exercise them. Especially when you have nothing to hide.
Rights are like muscles. If you do not use them, they atrophy. Use them. Work them out. That makes them stronger.
I recommend this short video on the topic: “How to Deal with Police at Your Door.”