And some of the Iraqi groups themselves have misgivings about new American backing.
The message expressed American backing for the "constitutional process" that had resulted in his being elevated to the presidency.
Despite this American backing, the level of their support - or even recognition - in a country still struggling for normalcy is unknown.
This is an effort that deserves stronger American backing.
He started his company less than a year ago, with American backing.
The two sides opposed each other in the devastating civil war in the 1940's, which right-wing forces won with American backing.
And could such a venture succeed in Russia, or does he really need American backing?
"He knows that he'd get American backing if the choice is him or Dulmaa."
But Russia has voiced concern about American backing for what was the opposition.
They add that the apparent American backing he displays has won him some credibility here.