Giuliani took money from Qatar, Venezuela, Iranian exiles
His foreign clientele could present conflicts of interest as secretary of state.
Rudy Giuliani's paid consulting for foreign governments would present conflicts of interest as the nation's top diplomat that would make the Clinton Foundation look trifling.
Since leaving the New York mayor's office, Giuliani has made millions as a lawyer and consultant, including for some clients at odds with U.S. foreign policy. When some of those ties surfaced amid Giuliani's own presidential bid in 2007, they were considered to pose an unprecedented number of ethical quandaries for a potential commander in chief.
Now those concerns have no doubt been eclipsed by Donald Trump's own web of business entanglements, which are still not completely known to the public. Giuliani's participation in Trump's transition and contention for the job of secretary of state poses a direct challenge to Trump's promises to root out Washington self-dealing and ban his administration's officials from lobbying for foreign governments.
In 2011, an exiled Iranian political party called the Mujahedin e-Khalq, known as the MEK, paid Giuliani to give a speech in Washington calling on the State Department to remove the group from its list of terrorist organizations. The MEK recruited a host of other formal officials to its cause and succeeded in reversing the terrorist designation in 2012.
http://www.politico.com/story/2016/11/giuliani-foreign-clientele-possible-conflicts-231413