The paper expressed concerns about the campaign’s overall strategy, saying Mr. Romney, the presumptive Republican nominee, responded to attacks on his wealth by “vacationing this week at his lake-side home with a jet-ski cameo.” And it said that the campaign has failed to respond effectively to attacks on Mr. Romney’s time at Bain Capital.

“Team Obama is now opening up a new assault on Mr. Romney as a job outsourcer with foreign bank accounts, and if the Boston boys let that one go unanswered, they ought to be fired for malpractice,” the paper said.

The campaign did not respond to requests for comment.

The editorial follows several days of nervous commentary from conservatives — including the paper’s owner, Rupert Murdoch — suggesting that Mr. Romney’s team of campaign aides is not up to the task of challenging Mr. Obama’s campaign.

“Met Romney last week,” Mr. Murdoch wrote on Twitter last week. “Tough O Chicago pros will be hard to beat unless he drops old friends from team and hires some real pros. Doubtful.”

Eric Fehrnstrom, a senior adviser to Mr. Romney, said on Thursday that the campaign was “very happy with the team that we have” and that “we like the way things are right now.”