Paraphrase of POTUS:

We are at war.

It IS the Chinese virus. That's where it came from. I don't think, I know.

No, China didn't release it on purpose to harm us. But they could have notified us sooner (and put us in a better position to respond).

They could have notified us sooner (said a 2nd time).

Unseen enemy (in context, seemingly referring to the virus or the origin of the virus).