Low oil prices are hitting Venezuela hard. 65% of their gov't spending is funded by oil. A lot of it is shipped to the Gulf Coast for refining. The XL pipeline will take much of that market away & hurt the Venezuela gov't even more. And they are already in trouble as production has fallen by 1/3 since 2000 and the socialist government has grossly mismanaged it's affairs.
Lower prices will also hit other countries who are not our "friends", such as Russia, where 40% of it's budget comes from oil and Russia, not Saudi Arabia, is the worlds largest oil producer (Saudi has bigger reserves, but Russia is pumping more). Iran will also be hurt.
So enjoy lower prices for your bank account benefit as well as our foreign affairs situation!