I have been following Latin America a little bit on You Tube - a former military guy who used to be stationed in South America. Chances are this VP drug dealer will be President when Maduro is forced out.
He has stated that Russia already has military assets there. I tried to find something more current but here’s a couple of articles - guess LSM ignored it as did Obama.
At any rate the Admiral in charge of this area has noted that he doesn’t have the assets he needs for defense.
http://guardianlv.com/2014/03/argentina-to-host-russian-military-bases-while-america-sleeps/
https://www.theguardian.com/world/2009/mar/16/chavez-russia-venezuela-nuclear-base