Unfortunately this fact is not widely known because it has been suppressed by the MSM.
If it were a fact, it would be widely known.
CITGO is "an American company" based in Houston but it...
"...is owned by PDV America, Inc., an indirect, wholly owned subsidiary of Petróleos de Venezuela, S.A., the national oil company of the Bolivarian Republic of Venezuela"
[source citgo.com] - which is Chavez owned and controlled