RCP is (I think) the only source for a Red Wisconsin. Its premature.
RealClearPolitics is wrong. It was Very, Very, Very close in Wisconsin, but Kerry won by a fingernail. According to the C-Span election count:
Wisconsin ElectTotal: 10 Precincts Reporting: 100%
Name Party Vote Pct Electoral
Bush Rep 1,477,122 49 0
Kerry Dem 1,488,935 50 10
Nader Ind 16,324 1 0
Badnarik Lib 6,456 0 0