Hi Tim;
Here we go again
Generally, a good idea.
Like it or not, we are the unofficial Policemen of the World
We are the only country with any real power anymore & as such we can not sit ideally by & watch anarchy take over in other countries especially ones so close to us.
I'm sure the Haitians want us there as the average Haitian citizen is sick of all the fighting & they do not seem to be able to stop it themselves.
It is not very neighborly of use to simply sit by & let them kill each other when we have the power to stop it.
Many Haitians would love it if we would simply take over the country & bring peace, stability, & some resemblance of prosperity to the island. Once a good government is installed, up & running, we then could leave them to govern themselves; something like we are trying to do in Iraq.
Some people want to go it alone, stay out of other people's business (and countries) & to be isolationist. This has never worked for us because we seem to care about the state of other countries.
Before World War One we were truly isolationist but we simply could not sit back any longer & see our long time ally, Great Britain, mired down in a bloody never ending conflict with Germany. The same thing happened in WWII.
Since WWI we have been a world power & like it or not the unofficial Policemen of the World.
Policemen have responsibilities & ours seems to be to try to keep anarchy & despots to a minimum in the hope that someday the world will be a better place to live, especially in the countries that are having major problems due to incompetence, corruption, & in general bad government.