circmand,
Wisconsin has not had the death penalty for 150 years. I'm not sure what you are talking about.

And yes, the duly elected governor of a state can, in accordance with that state's constitution, pardon someone, though I know of no death row inmate awaiting execution that has ever been pardoned. What I am familiar with is governors granting stays of execution for evidentiary or procedural issues, or possibly commuting a sentence, say from death to life in prison. So again, I am not sure which governor execution pardons you are thinking of.