So, when was the last time a Head of State got 5 minutes notice to meet another?

Let alone when that Head of State is flying into his country's airspace?

Hell, Grant and Lee arranged to meet on several hours notice when the later surrendered and that was in one country where the former didn't recognize the latter as a representing a legitimate government.

I'm pretty sure Stalin never visited his eastern client states by essentially flying in and knocking on the door like he wanted to borrow a cup of sugar (and being Stalin also bust a cap in a close personal friend of his host).

Al-Maliki's big problem is asserting his independence from the United States.

This won't help because it demonstrates his complete dependence.