My answer is yes. We oppose the spread of communism in our hemisphere, pure and simple.
Coups destabilize a country causes refugees leads to more destabilization as other countries trust America even less.
At this time you have twp very pressing problems.
1)The Long War
2) Illegal immigration.
The Long War is a war between opposing ideologies you could say but it is apart from Afghanistan and Iraq more a war of covert action and overt action such as propaganda.
Where America is seen as a stabilizing force not a destabilizing one. Its not only South America that is watching America the new emerging countries in the Far East, Central Asia and the Caucasus, are also watching.
We have troops and aid units operating in many of these countries where America is selling her self as a stablwerlising influence.
Illegal Immigration.
You have a major problem, there is talk, and at the moment that is all it is of guarding your borders sealing them off, but what about trying to stop the problem at source.
Working with the governments of South America encouraging programs that help there citizens even if it smacks of socialism.
After all third world and second world countries need some form of socialism before they move onto capitalism if only to create a stable structure, education and health system to work from.
Coups and more coups only encourages destability in a already unstable region creating more illegal immigrants.
Also if you feel that your country has the right to interfere within a region you regard as your hemisphere, then does that not entitle the citizens of your hemisphere the right to come live with you.