The first question to answer is WHERE is it built in the US?
Assembly of first AH-1Z begun at Hurst, Texas, in April 1999, by which time 85% of drawings had been released, with design work due for completion by end of 1999. Initial AH-1Z (162549, c/n 59001) completed final assembly in second quarter of 2000 and moved to Bell Flight Research Center at Arlington, Texas, for installation of instrumentation and functional testing that included restrained ground running which was completed in October 2000.
http://www.aviastar.org/helicopters_eng/bell_supercobra.php
Texas, I think. This deal is in competition with a similar deal that Pakistan was considering with Russia. Some things have little to do with Obama.