Just out of curiosity, how it a mispronunciation if the guy's name is "S. R. Sidarth" and Allen said "macaca"? If Allen had been talking to Senator Akaka, that would be believable. This Sidarth guy's name is nowhere close.
(FYI - I have no idea if Allen knew that "macaca" is an insult in some countries - no reason to believe he knew.)
From what I heard, he had been told the guy's name and somehow it later got mixed up in his head and came out the way it did. I think he was just reaching for something to say. I've maintained all along that Allen isn't the brightest bulb on the tree and isn't presidential material in my mind, but he's still smarter than the 44 Dems. on the Dem. senate side and certainly compared to his opponent.
By the way, I heard also that he was referring to the fact the guy had a mohawk and was trying to say mohawk and it just came out wrong.