Washington Post publisher Katharine Weymouth said today she was cancelling plans for an exclusive "salon" at her home where for as much as $250,000, the Post offered lobbyists and association executives off-the-record access to "those powerful few" — Obama administration officials, members of Congress, and even the paper’s own reporters and editors. The astonishing offer was detailed in a flier circulated Wednesday to a health care lobbyist, who provided it to a reporter because the lobbyist said he felt it was a conflict for the paper to charge for access to, as the flier says, its “health care reporting and...