Why did the networks take so long to call Wisconsin?

[100% pro-life no matter what]

For the same reason they took so long to call Georgia, Iowa, Ohio, Arizona, Missouri, etc. etc.

I was quite surprised that they called Montana at poll closing time, honestly.

Complete shock and denial?

Missouri isn't usually called until 10PM anyway though (though Fox did call it when polls closed). For example, Missouri wasn't called for Romney and Bush 04 til 10PMish. Missouri counts its votes way too slowly.

Arizona I could KIND OF see them calling it a bit late. When CNN and CBS called it (around the same time at 2:30 AM) sounded reasonable.

Georgia's late call was crazy too! Called 2 hours late. They called Virginia and Colorado ASAP  for Clinton (nothing wrong with that) but were hesitant to call Georgia, Ohio, and Wisconsin.

Didn't FOX call Florida before Georgia?  Didn't South Carolina also take a while?

[100% pro-life no matter what]

Wasn't Wisconsin the closest of the larger states?

Michigan was much closer, and Pennsylvania became closer than Wisconsin days after the election.