Marc Lynch, who used to write useful journalism about Middle Eastern media as Abu Aardvark, points out that Iraq is currently boiling.
Lynch thinks Maliki can be persuaded to reduce Shiite domination of his government and to bring disaffected Sunnis back into some power within his state. It's hard to see why he thinks this can be accomplished. Maliki's incentive to maintain Shiite rule not likely to go away -- it is the source of his own authoritarian regime
Or so reading Nir Rosen's mammoth Aftermath: Following the Bloodshed of America's Wars in the Muslim World would lead me to believe. Rosen, alone among U.S. journalists that I've read, was able to pass unnoticed through the dangerous streets and towns of Iraq for most of the last decade, to meet and befriend (male) Iraqis from all camps including some close to al-Qaeda, and tell their stories. His book is long and intricate and absolutely worth the effort to learn what it was we did in that unhappy country.
And it certainly reveals the absurdity of thinking that Maliki's upcoming visit to Washington is going to change much of anything.