As others have noted, the Mooch’s portrait looks more like one of those over-shaded high school pencil drawings (and the woman who painted it has zero fashion sense; her skirt looks like the tailor forgot to trim off a bunch of the fabric before it was assembled).
Obongo’s painting has some odd elements to it. In no particular order: the flowers among the greenery are oddly symmetrically placed. It’s almost like one of those “magic eye” pictures. The setting itself is almost surrealist, with an ornate wooden chair surrounded by some kind of ivy (except that ivy doesn’t flower like that). The way the greenery envelops the chair, it sure looks like it’s back in a corner. Then, you have Obongo sitting out on the edge of the chair, which to my mind conveys the impression that he feels like he isn’t supposed to be there; it’s not his chair or he’s uncomfortable sitting back into the chair. With the leaves covering his legs and feet, it’s as though he’s fading into the background, and the message I get is that he’s not the most important thing in the picture.
All in all, very odd imagery.
Looking again at Obongo’s picture, I just realized why it looks so odd: there’s no depth there (a fitting metaphor for his presidency if ever there was one). The chair looks completely flat because of the way some of the greenery covers it in places, and the way the greenery covers his right leg yet doesn’t cover the right-front leg of the chair (left front for the viewer).