President Obama reportedly criticized the Supreme Court's Citizens United case during his State of the Union address, claiming that the decision opens the floodgates to political spending by corporations, including foreign ones. According to this blog post at the NY Times, Justice Alito took quiet exception to the President's assertion, shaking his head and muttering "not true." As the NY Times blog post notes, the majority opinion in Citizens United left undecided the question of the First Amendment rights of foreign corporations.
My question - which really is a question, as I know very little about corporate law - is how hard it would be for a foreign corporation to separately incorporate a US subsidiary with the sole or predominant goal of influencing US political campaigns? Just wondering.