Wisconsin will test Clinton's support

(Yahoo News) - Wisconsin is almost the kind of state Hillary Rodham Clinton would have invented to win a Democratic presidential primary, brimming with whites and working class voters who usually support her. A poor performance there Tuesday would raise big questions about her candidacy.

Clinton needs to do something to break Barack Obama's momentum. Her rival has won in eight straight states, including decisive victories last week in Virginia and Maryland, and has begun to diminish her edge with core supporters like women and the elderly.

The Illinois senator also has established a small lead in the crucial hunt for delegates who will pick the party's nominee at this summer's convention in Denver, and he continues to raise more money than Clinton.