In an article discussing House Speaker John Boehner's performance in his job, the Post referred to his negotiations last summer with President Obama over, "the federal government’s swelling debt problem." Newspapers interested in maintaining the separation between the news and opinion pages would have simple referred to the debate over raising the debt ceiling, which is what was at issue.
The debt has risen rapidly because of the recession that followed in the wake of the collapse of the housing bubble. Financial markets do not see the debt as a problem, which we know since they are willing to lend the government huge amounts of money at very low interest rates. There was no reason to interject this sort of editorial comment in a news story.