Buying House to Flip that has a current tenant

[Dustin Jamison]

I have a lead on a house that I would like to rehab/flip.  The owner currently has a tenant in the house with a lease that doesn't end until December of 2017.  The owner wants to sell the property because the current tenant is not taking care of the property.

My question is that if I purchase the house, is that lease still valid?  Would the lease be tied to the property itself or to the current landlord?

If it is valid, does anyone have a suggestion to help the owner get the bad tenant out of the house so that I can purchase the property?

I appreciate any tips.