Rasmussen shows a tight race in Wisconsin and a strong Clinton lead in Ohio:

Wisconsin (Feb 13, 855 LV)
Obama 47
Clinton 43
Undecided 10

Ohio (Feb 13, 754 LV)
Clinton 51
Obama 37
Undecided 12

Quinnipiac also shows leads for Clinton in Ohio and Pennsylvania.

Clinton seems to be contesting Wisconsin, which is probably a good strategy for her. I don't know what her internal polls are saying, but public polls seem to suggest that she could prevent another Obama blowout in Wisconsin. She could even be close enough to possibly win there. She'd probably be in better condition heading into the March 4 primaries as a Wisconsin victor. Obama's widely expected to win Hawaii next Tuesday, so a Clinton loss in Wisconsin would give Obama a 10-primary winning streak.