Time says Clinton faces a cash crunch.

From Time:

Along with a change of her political fortunes as the result of her devastating loss in Iowa and dropping poll numbers in New Hampshire, Hillary Clinton's once-flush presidential campaign now faces a problem that few would have expected at this point: a sudden urgency to raise a lot of money fast [for the big and expensive states like New York and California that hold their primaries on February 5].

One reason for the new drive to raise cash quickly is the fact that Clinton spent lavishly on what turned out to be a debacle in Iowa.