And as i watch the news they are starting  to interview landlords that are voluntarily waiving rent for the next month.. so those folks are getting a ton of good will and national exposure.  

Continue pressing forward because there is a rainbow on the other side with a fat pot of gold aka your money.

As a landlord, I would probably ask you to voluntarily give up your weapon or move.

So although it isn't an official shut down, schools are closed, all events shut down, all restaurant dining areas are shut, the mall is shut and many businesses have voluntarily shut down.

Beyond that period you could do so, knowing that you forfeit your earnest money (if relevant in your state).Regarding revising the price -- In my opinion I'd say if your local market is going to pot because everybody, or most bodies, are in your situation then it COULD be worth talking to your agent about. 

But in reality, this sounds like a simply trespassing, since he voluntarily left the house. 

Perfect time to buckle down, drink a pot of coffee, and find some leads.

If a tenant is willing to sign a new lease with you voluntarily you can do that at anytime.

Even though pot is legal in Canada, if your lease says you are not allowed to smoke it in the house, the lease stands. 

When I want to make a meal, I put about a 1:1 ratio of each in a soup pot, with a healthy dose of the black bean liquid in there.