If you read his blog, he states that he has a pretty long lead time. He says relation to current events just happens coincidentally. When you think about it, he publishes one comic a day and they're often total non sequiturs, so it will happen by circumstance somewhat frequently.
If he even has the ability to get one approved and published quickly, which I'd say is doubtful given that it's print, it's probably a nuclear option that he wouldn't use for having seen a few threads here.
> He says relation to current events just happens coincidentally.
In one of his books, he talked about this in greater detail. One of the examples he cited was a comic where someone made a joke about a "dead nun in a snow drift" - that just happened to run the same day as a bus crash that left a whole bunch of nuns dead.
If he even has the ability to get one approved and published quickly, which I'd say is doubtful given that it's print, it's probably a nuclear option that he wouldn't use for having seen a few threads here.