Here's another important point, and a reason why people from other countries shouldn't be trying to directly involve our election:

In the United States we have some very important concepts that most folks from elsewhere do not understand:

Separation of Power
Checks and Balances

These two concepts are integral to our form of government and they are core founding principles.

Because of these concepts, our President is extremely limited in what he can do. If more people abroad understood this, they might not find it so necessary to meddle.