The Bush Administration has both the inclination and the power to cancel the 2008 election.
The GOP strategy for another electoral theft in 2008 has taken clear shape, though we must assume there is much more we don't know.
But we must also assume that if it appears to Team Bush/Cheney/Rove that the GOP will lose the 2008 election anyway (as it lost in Ohio 2006) we cannot ignore the possibility that they would simply cancel the election. Those who think this crew will quietly walk away from power are simply not paying attention.
The real question is not how or when they might do it. It's how, realistically, we can stop them.
In Florida 2000, Team Bush had a game plan involving a handful of tactics. With Jeb Bush in the governor's mansion, the GOP used a combination of disenfranchisement, intimidation, faulty ballots, electronic voting fraud, a rigged vote count and an aborted recount, courtesy of the US Supreme Court.