Senator Hillary Rodham Clinton is bracing for one of the most difficult days of her presidential race on Wednesday, anticipating new pressure to quit the race and facing a set of financial and logistical decisions that will determine just how robust a campaign she can continue to wage

And that is only for starters

Mrs. Clinton is also bound to think over a question in her own head and to hear it from at least some supporters — should she continue running?

The advisers and allies to Mrs. Clinton said in interviews on Tuesday night that her victory in Indiana — even by less than 2 percentage points — made it less certain that she would withdraw from the race.

Yet these supporters said that North Carolina had come to be seen as a major test in the eyes of the Clintons and their aides, and the severity of her loss to Mr. Obama there was dispiriting.

Her campaign is deep in debt and believed to be near broke