Lobbying is Washington's grubby secret. Some say lobbying is part of the democratic process. Others claim it is legalised bribery, even corruption. But love it or loathe it, it is the way Washington works.
Usually you hear little about the quiet meetings, the lavish lunches and junkets that lubricate American politics. But every once in a while something comes along to open the system to what it hates most: daylight. The case of Jack Abramoff, influence-peddler extraordinaire, is one of those somethings.
Once Mr Abramoff claimed to have done nothing illegal, that his only sin was to have been too good at his job. But now his career is in ruins, a jail term of nine years or more beckons - an incarceration that would be even longer but for the plea bargain he reached yesterday with federal prosecutors.
For Mr Abramoff only contrition is left: "Words will not ever be able to express my sorrow and my profound regret for my actions and mistakes," he said in court yesterday. As for the two dozen members of Congress and their aides reputedly under investigation, they can only tremble.
If Mr Abramoff spills the beans, they may soon be contemplating a similar fate. This is potentially the biggest Congressional scandal of the modern era. It is largely (though not exclusively) Republican, and may mark the beginning of the end of the party's 11-year dominance of Capitol Hill.