I would offer that this section of Donald Trump's speech announcing his pick of Indiana Gov. Mike Pence as his running mate was the most telling.

"Back to Mike Pence," it began, since he'd to that point spent very little time talking about Mike Pence. This was about 16-and-a-half minutes into the speech, and Trump, who'd increasingly been straying from the written remarks he had in front of him, realized it was time to get to the business at hand.

Back to Mike Pence. So one of the primary reasons I chose Mike was I looked at Indiana, and I won Indiana big. Remember, Indiana was going to be the firewall. That's where Trump was going to — they agreed I'd win New York, I'd win Pennsylvania, I'd win all these places. But Indiana was going to be the firewall. So I got to study Indiana, and I got to study New York and a lot of other places, and I saw how NAFTA, signed by Bill Clinton, has drained our manufacturing jobs, just drained us like we've never been drained before. NAFTA, again, signed by Bill Clinton. NAFTA is the worst economic deal in the history of our country. Manufacturing down in some states 55 percent, 60 percent. It's a horror show, moving to Mexico, moving to other places.

And so on. The "back to Mike Pence" consisted of a mention of Indiana that became a discussion of NAFTA, which became a ding on the Clintons. "Back to Mike Pence" ended up back at Hillary Clinton.

There's a reason The Post's story on Trump's speech is titled, "In introducing Mike Pence, Donald Trump keeps the spotlight on himself." Donald Trump was Trump's preferred topic on the day he was meant to be introducing the world to the governor from Indiana — a man who a CBS poll this week found was unknown by 86 percent of the country. Trump botched his first chance on Friday to ensure America understood why he'd (apparently rather grudgingly) selected Pence as his running mate; on Saturday, he spent most of his words talking about himself.

We catalogued every word of Trump's speech and coded it by topic. Was Trump talking about himself? About Pence? About the ticket? About Hillary Clinton? By our necessarily subjective estimates, Trump spent about 1,600 of his 4,000-word speech on his favorite topic. Pence got about 860 words, a little more than half as much. Trump talked about Pence or the combined ticket about a quarter of the time.

Again, this is subjective. But you can check our work. Here's the speech, color-coded by how we described each sentence (or, in some cases, parts of sentence). Trump's speech about Pence was about Trump. Which, really, isn't much of a surprise.