Wisconsin (D). Open primary (independents can vote) -- 74 delegates up for grabs (48 proportional by CD, 15% threshold; 26 by statewide vote, 15% threshold).
Wisconsin (R). Open primary (independents can vote) -- 37 delegates at stake (24 winner-take-all by CD; 16 winner-take-all by statewide vote).
Hawaii (D). Closed caucuses (independents cannot vote) -- 20 delegates up for grabs (13 proportional by the state's two CDs, 15% threshold; 7 based on statewide results, 15% threshold).
Washington (R). Open primary (independents can vote): Feb. 9 caucuses were used to determine 18 (or 49%) of the state's pledged delegates. Today's primary will determine the back half (or 51% -- 19 delegates) -- 10 proportional by statewide vote, 20% threshold; 9 WTA by CD.
Note: Washington's Democratic primary is a beauty contest. Democrats will base all pledged delegate allocation on results of February 9 caucuses.
Obama made 11 stops in Wisconsin in the run-up to today's vote.
McCain isn't taking Wisconsin for granted, especially since the rules of the two primaries make it likely he'll be facing a very conservative electorate today -- which could keep Huckabee closer than necessary, particularly if a lot of moderates vote in the Dem primary.
The state is expecting a turnout of approximately 35%, which is high for a presidential primary.
Previewing tonight's Hawaii caucuses, Time notes how Obama didn't do well with Asian voters in California.
And this is one campaign duty we're guessing Chelsea Clinton or the folks staffing her are complaining about: campaigning in Hawaii.