It's the funniest ad of the political season so far.  I have already watched it four times.  It's an ad about Marco Rubio, and he doesn't even appear in it.  At least, not the top half of him...

It all started when Ted Cruz's campaign mocked Rubio's "high-heeled booties" that looked rather...feminine.

Then the Bush campaign picked up on this, making a video showing the bottom half of someone, wearing those same boots, dancing to the tune of "These Boots Are Made for Walkin" by Nancy Sinatra, with slightly different lyrics.

"These boots are made for flippin'
And that's just what they'll do.
One of these days young Marco's
Going to flip flop flip on you"

The ad talks about Marco Rubio's flip-flops on immigration and a few other topics.  But the video isn't really about that.  After all, Jeb Bush has the same position on immigration as Rubio.  And Rubio hasn't really flip-flopped all that much – he still supports amnesty for illegal aliens.

So what is the ad really about?

As you watch the bottom half of "Marco" rapidly prancing back and forth across the screen, his feet sauntering this way and that, you realize it isn't so much about flip-flopping as implying that Marco is a lightweight politician, a young kid who is in over his head and is just playing around.

Even though it is ostensibly an issues ad, I view it as a stealth attack on Rubio's character.  When I watch him on stage speaking a mile a minute as he recites chunks of prepared text, he looks out of his league.  Now, when someone like Ted Cruz speaks, he also is probably reciting rehearsed lines, but he does it in a slower, deliberate, more mature, and much more natural way.  When Rubio speaks, he looks uncomfortable, like a child reading something in front of a class.

This ad is meant to capitalize on Rubio's lack of gravitas, and it does so with a very pleasant tune.

What do you think?  Is this the funniest ad you've seen so far?

This article was written by Ed Straker, senior writer of NewsMachete.com, the conservative news site.