Wisconsin: Turnout and the dreaded undecideds are the key to the election

Here, though I have to quibble with the point about voter turnout. The author notes that turnout was much lower than in the last regular election for those seats, but since that election was a presidential election, that is not a surprise. Also, aggregating the senate recalls together (though he only lists seven, not nine) is not a good way to look at it. Some were hyper competitive, others were near blowouts.