Senator Hillary Rodham Clinton lent her campaign another $1 million at the end of June, underscoring the difficulty she was having staying ahead of creditors and retiring a mountain of campaign debt, filings with the Federal Election Commission show.

Even though the Democratic nomination fight came to a close in early June, with Senator Barack Obama emerging as the presumed nominee, Mrs. Clinton's debts to her vendors increased to $12 million at the end of the month from $10.4 million at the end of May.

In addition, after her latest loan on June 30, Mrs. Clinton has now lent her campaign a total of $13.2 million.

The Clinton campaign's debt and how much Mr. Obama's doing to help her tackle it has been an ongoing sore spot in the efforts to bring their supporters and the party together.

Mr. Obama himself wrote a check of $2,300 to Mrs. Clinton at the end of June as a symbolic gesture and her campaign has continued to send out e-mails to asking for help tackling its unpaid bills. But the Clinton campaign took in just $2.7 million from donors in June, less than the $5.4 million it spent as it continued to pay some staff members' salaries and wrapped up its operations.

By Michael Luo, The New York Times, July 20, 2008