Seems to me that they’ve already resigned.
Yup! They have abandoned their job and fled to another State. The Governor should appoint temporaries to fill the absent positions until next election.
Yep, but if the State constitution allows it, then it needs to be done, if the State constitution doesn't allow it then the state constitution needs to be changed the first change the conservatives get a chance to change it. If only one state Senator gets recalled it would send a strong signal to the other state senators, and other representative across the U.S. that they have to do their constitution duty or get fire by the people of the state, they work for the people of the state not the state, or some damn union controlled state.