I like the exercise, but I can't think of anything other than perhaps the cost of housing lowering as many Americans move to other countries...?

Well that is a couple of positives :-)

i think what you require of us is Rationality...though even though Donald Duck likes to whine alot...

this takes rational thinking. the fact that i'm not even american nor am i living in america well...positives huh?

hmm yeah he'll minimize overpopulation and bring an all american community to start rebuilding
he'll certainly won't have to deal with drug cartels [not saying all latinos are part of that]
he'll provide houses for all american citizens and nationalities. with his "aliens" gone...

if you say negatives well people would really make a comment war here...

People will name their kids Donald and weird hair may catch on

Hmmmm...his supporters will realize their mistake?