Probably Clinton, but even he had his faults. Trying to feed Somalia, and then abandoning them when some bastards shot at us wasn't exactly a triumph.
It was Bush Sr who sent US troops into Somalia; Clinton inherited the situation.
Well, it was the UN (voting unanimously) who sent the troops and food in, but yes, it was Bush the First who really pushed the issue. It was Clinton that told the men on the ground that they couldn't use armor or proper air support. It was Clinton that pussed out when that decision lead to the deaths of a many hundreds of Somalians and 18 Americans.
(of course those numbers pale when compared to the hundreds of thousands who starved to death or died in the ensuing civil war...not to mention the hundreds of thousands that have died since....obviously it's not all Clinton's fault, the asshats from there trying to enforce their idiotic rules on the locals deserve the lion's share of the blame)