Her campaign is massive debt:
Barack Obama began the month of April with a 5-1 cash advantage over a debt-saddled Hillary Rodham Clinton, setting the stage for his lopsided spending in the crucial primary state of Pennsylvania.
Financial reports filed Sunday by the Democratic presidential candidates with the Federal Election Commission show Clinton had $10.3 million in debts at the start of the month and only about $9 million cash on hand for the primaries. Obama reported having $42 million for the primary.
(emphasis added)
So how viable will she be against John McCain in the general if she is already this far in the red? Obama has proven his ability to raise record amounts of money. Going against the right wing noise machine, it takes money to be louder. Obama can afford to be the loudest candidate in the general.