if you were to replace your current capital city with a new one, where would it be?
for Wisconsin, Wausau makes sense geographically, but the population center of the state is in Markesan in the SE part of the state, and not far from Madison. so Madison seems to be a decent location.
for Idaho, the geographic center of the state would be Challis. while technically centrally located, Challis would be far from the larger population centers in the state and not easy to get to.
the current population center of the state is somewhere in this valley in the Sawtooth mountains:
would be a nice scenic location for a state capital, but even worse than Challis when it comes to convenient access. and the population center keeps drifting southwest of here towards Boise, so it would eventually be even deeper within the Sawtooth range.
thus, Boise is probably a decent location for the capital.
so for Wisconsin and Idaho, congrats: you can keep your capitals where they are.