that led to Aristide departure...cutting back our aid and support to Aristide certainly had an effect...here's a TNR article that offers some plausible explinations
Ten years ago, U.S. forces invaded Haiti and restored President Jean-Bertrand Aristide to power. Yesterday, rebels undid our handiwork, forcing Aristide into exile and throwing Haiti's future into uncertainty. In 1994, Aristide duped the White House into believing he was a Caribbean Mandela; he was, in fact, a megalomaniacal demagogue. After his return to power, he presided over the disintegration of democracy in Haiti; by any standard, the remaining years of his presidency were a disaster. All of which might appear to call into question Bill Clinton's decision to invade Haiti and install Aristide in 1994. In fact, far from casting doubt on his decision, history has vindicated Clinton's intervention. Aristide may have been a thug, and Haiti may now be better off without him, but restoring him to power was the right thing to do.
Overthrown in a military coup just seven months after winning his country's presidency with two-thirds of the vote, Aristide spent his exile stumping across the United States and attracting admirers on Capitol Hill. He said all the right things to his American hosts--about cultivating the rule of law, about building a middle class, and about adhering to a constitution. He was modest, too. Though his Washington backers argued that he should get three extra years in office to compensate for his exile, he vowed not to stay on past 1995, because doing so might appear to prolong Haiti's tradition of dictatorship. "I think there is more grandeur in stepping down," he told The New Yorker. "It's the constitutional thing to do and it's the statesmanlike thing to do."
But his supporters--Clinton among them--ignored evidence that Aristide was not the voice of reason he proclaimed to be. As a populist clergyman, he had already shown a tendency to rely on mobs. In 1993, the director of Human Rights Watch pointed out that during his brief stint as president, Aristide had refused to condemn 25 lynchings perpetrated by his followers, and that "he condoned threats of popular violence against the judiciary and the legislature." In a memoir released that same year, Aristide said that representative democracy was not an "indispensable corollary" to human rights.
Turns out Aristide was merely saying what his American hosts wanted to hear. He never nurtured the civil institutions that form the cornerstones of democracy--such as a market economy, an independent judiciary, and a functional bureaucracy. Meanwhile, he started arming militias loyal to his party, Lavalas. He had to be persuaded by several heads of state to leave office at the end of his term in 1995, which he did reluctantly and only after anointing a successor (and surrogate) in René Préval. When the constitutional liberals of Lavalas grew frustrated with his puppetry of Préval, Aristide formed his own political faction whose singular ideology was fealty to him. In 2000, he rigged 14 of 19 legislative elections; he soon rigged his own return to power. He has completely undone what modest democratic traditions Haitians struggled to build in the early 1990s.
http://www.tnr.com/doc.mhtml?i=express&s=kushner030104