Marco Rubio actually said...

it is not charity. It is in the national security and national interest of the United States to help nations build capacity

The most effective thing we can do is to take away the reasons why people are leaving these countries in the first place.

Regimes such as these habitually and routinely use negotiations... as a way to buy time to further their grip on power.

A Russian military base in Nicaragua of any capacity would be a national security threat to the United States.