So Obama's campaign manager retweeted "The chimichanga? It may be the only thing Republicans have left to offer Latinos."
Yes, the sentiment is the equivalent of "The watermelon? It may be the only thing Republicans have left to offer blacks," so blah blah racism blah blah liberal hypocrisy.
But does it offer any entertainment value?
Well, "chimichanga" is one of those inherently-funny-sounding words (like "underpants" or "Cucamonga"), so it's always good for a schoolboy giggle. However, that's the only level it works at, as the rest of the line has no larger point to make aside from "Republicans stink because they don't give people free stuff," and certainly does not do so in any way that's even remotely clever or witty.
So, not particularly noteworthy. I'd give it a 3 out of 10.