The aircraft must be built largely in India as part of Prime Minister Narendra Modi's drive to build a domestic industrial base. The air force said in a notice that "85 percent will have to be made in India by a Strategic Partner/Indian Production Agency".
Pakistan, which expected to get the fighters at the subsidised rate of $270 million, was subsequently asked by the US administration to make the full payment for the eight aircraft from its national resources.
Quoting an unnamed official in administration, a BBC report said that the because of the hold on it by Senators in the Senate, the US Government will not be using any of the tax payers money to sell F-18 to Pakistan.
In the letter, Paul urged Senators to join him in blocking the sale of F-16s to Pakistan in an over USD 600 million deal. "I request that you support the resolution of disapproval when it comes up for consideration."