Even if Citgo were to be broken up and they wanted to buy 10% of it, that would be about $1.3 billion which they don't have. 

Interesting thought though, if they were to get someone to lend them the money and bought 1/10 of Citgo and others bought the rest, theoretically, they'd get their investment back on the sale proceeds and own 10% percent of Citgo for free.

I know RML is run by Russians, but isn't it technically a Canadian company?