Here is the president's statement blocking this deal.

http://m.whitehouse.gov/t...r-us-wind-farm-project-c

According to the statement, President Obama relied on 721(f) of the Defense Production Act of 1950 for his authority to put the kibosh on this deal.

(f) Factors to be Considered
For purposes of this section, the President or the President’s designee may, taking into
account the requirements of national security, consider—
(1) domestic production needed for projected national defense requirements,
(2) the capability and capacity of domestic industries to meet national defense
requirements, including the availability of human resources, products, technology, materials,
and other supplies and services,
(3) the control of domestic industries and commercial activity by foreign citizens as it
affects the capability and capacity of the United States to meet the requirements of national
security,
(4) the potential effects of the proposed or pending transaction on sales of military
goods, equipment, or technology to any country—
(A) identified by the Secretary of State—
(i) under section 6(j) of the Export Administration Act of 1979 [section 2405(j)
of this Appendix], as a country that supports terrorism;
(ii) under section 6(l) of the Export Administration Act of 1979 [section
2405(l) of this Appendix], as a country of concern regarding missile proliferation; or
(iii) under section 6(m) of the Export Administration Act of 1979 [section 2405(m) of this
Appendix], as a country of concern regarding the proliferation of chemical and biological
weapons;
(B) identified by the Secretary of Defense as posing a potential regional military
threat to the interests of the United States; or
(C) listed under section 309(c) of the Nuclear Non-Proliferation Act of 1978 [42
U.S.C. App. § 2139a(c)] on the “Nuclear Non-Proliferation-Special Country List” [15 C.F.R.
Part 778, Supplement No. 4] or any successor list;
(5) the potential effects of the proposed or pending transaction on United States
international technological leadership in areas affecting United States national security;
(6) the potential national security-related effects on United States critical
infrastructure, including major energy assets;
(7) the potential national security-related effects on United States critical technologies;
( whether the covered transaction is a foreign government-controlled transaction, as
determined under subsection (b)(1)(B);
(9) as appropriate, and particularly with respect to transactions requiring an
investigation under subsection (b)(1)(B), a review of the current assessment of—
(A) the adherence of the subject country to nonproliferation control regimes,
including treaties and multilateral supply guidelines, which shall draw on, but not be limited
to, the annual report on “Adherence to and Compliance with Arms Control, Nonproliferation
and Disarmament Agreements and Commitments” required by section 403 of the Arms
Control and Disarmament Act;
(B) the relationship of such country with the United States, specifically on its
record on cooperating in counterterrorism efforts, which shall draw on, but not be limited to,
the report of the President to Congress under section 7120 of the Intelligence Reform and
Terrorism Prevention Act of 2004; and
(C) the potential for transshipment or diversion of technologies with military
applications, including an analysis of national export control laws and regulations;
(10) the long-term projection of United States requirements for sources of energy and
other critical resources and material; and
(11) such other factors as the President or the Committee may determine to be
appropriate, generally or in connection with a specific review or investigation.

Source: http://www.fema.gov/library/viewRecord.do?id=3590

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