A poll last week found that voters, by 50% to 37%, would prefer the Democrats to win control of Congress. If Bush’s opponents find themselves in a position of power, the temptation to humiliate him is likely to be irresistible.

The movement to impeach has left the fringe, says the Times Online.

If few senior Democrats are calling publicly for Bush to be placed in the dock, plenty are flirting with the idea. One of them is Al Gore, the defeated 2000 presidential candidate, who is increasingly talked up as a serious anti-war contender at the next election.

Gore said recently that Bush’s “unlawful” eavesdropping was part of a larger pattern of “seeming indifference” to the American constitution, which could well be an impeachable offence.