Price will never be a National Security issue and would be struck down in a blink of an eye by the courts.
Price is not the National Security issue, as you note. However, the potential for extreme disruption of supply due to reliance on foreign producers IS a security issue. Also, the realization that the monies going to some ME entities as payment for crude oil are likely being used to fund the jihadists and insugents against whom we are engaged in the WOT...that is a National Security issue, regardless of the price of crude oil.
I believe a National Security case can be made.