Ever traded in the petroleum futures market? The market works on supply and demand. Economics.101. And I am an ultra-right-wing member of the right-wing-conspiracy. BSBA, MBA, and Economics major.
So are you saying that if Venezuala supplies gasoline (just as an example) to Maine at 1.35/gallon, and only to Maine, and only to drivers who are given a "low-income" sticker on their driver's license by the state of Maine, are you saying that that wouldn't contribute to a lowering of gasoline prices everywhere?
Now, admittedly, Maine is such a small state that the effect might not be noticeable, which does not in any way invalidate what I am saying. If I say, "holding a match to that block of frozen iron is going to raise it's temperature", then you don't get to invalidate my statement by saying: "too small to measure".
Yes, maybe Maine is so small, that the national effect is too small to measure. But the principle is still sound.
Test it with this thought experiment:
What if Venezuala had the capacity and will (and cooperation with the US feds) so that every single Hispanic in America could buy gasoline at 1.35/gallon, subsidized by Venezuala. You don't think that would depress prices for everyone else?
If you don't, you better go get some more alphabets to string past your name.