This very interesting AP article claims that the former Haitian president Jean-Bertrand Aristide was forcibly removed from power by US forces against his will.
The article quotes Aristide himself as saying: "No. I was forced to leave. They were telling me that if I don't leave they would start shooting, and be killing in a matter of time."
Another interesting quote from the article: "Aristide told reporters that he signed documents relinquishing power out of fear that violence would erupt in Haiti if he didn't comply with the demands of "American security agents."
If this turns out to be true the rammifications of this are quite troubling indeed. This will mark the second time in as many years the US government will have deposed a foreign leader just because they didn't like him. However, it's far more serious this time. In Iraq, they tried to sell the action to the public and even got congressional approval first. In Haiti, I doubt congress was even sent an email about it before we went in. (Not that congressional authorization is an excuse to go into any country and remove people we don't like but at least it stays within the limits of the Consitution.)
To put it simply, if this is true, Bush just unilaterally deposed the leader of a foreign government without even consulting congress beforehand. This is a major step towards a military dictatorship and is a serious abuse of his presidential power.