An organization that played a key role in the White House’s effort to mislead the public and Congress about last summer’s nuclear agreement with Iran requested $750,000 for this campaign from a foundation backed by liberal billionaire George Soros, according to funding documents leaked to the public. The Ploughshares Fund, a liberal organization cited by top White House officials as a chief architect of the Obama administration’s campaign to push the Iran deal, requested the cash from Soros’s Open Society Foundations so that it could pay off “experts and validators” of the administration’s diplomacy with Iran, according to a funding...