the proposed sanctions "could prohibit any U.S. company from transacting routine business with critical partners from around the globe even if these transactions have no bearing on business" with the Islamic Republic.Apparently sanctions could penalize businesses doing business with businesses doing business with Iran -- if that's not too confusing. I'm not sure if their argument is correct, but it wouldn't surprise me a bit if sanctions had unintended consequences that ended up hurting U.S. business, while doing nothing to stop Iran's nuclear program.
"The proposals could have a large impact on the U.S. Export-Import Bank, precluding it from partnering with counterpart agencies abroad to co-finance U.S. exports that have no relation to Iran’s energy sector,"
Protectionism Isn't National Security: New at Reason
19 minutes ago