Story highlights Trump agreed to debate Cruz?

Rand Paul is endorsing who or what?

(CNN) And they said 2016 was invulnerable to parody.

It's been a weird and wild political season, and on this April Fools' Day, a couple of presidential candidates -- one active, one long retired from the race -- have tried to go a step further, having some fun with their followers on social media.

The U.S. Army is getting in on the game, too.

Here's what we've seen so far.

Ted Cruz 'Rickrolls' his supporters