The date was February 24 - hours after Trump won the Nevada Caucus. I had just flown to Texas, where the GOP was having a debate, and thought a lot about the race as I drove down the dark highway toward Houston.
At my hotel, I wrote an email to a very experienced Democratic strategist back in D.C.
"After watching him in a number of states now, I'm convinced he can win in November," I wrote of Trump.
Many people I knew would sort of try to humor me at first when they would hear me say that; but I would insist, telling them that Trump could win this whole thing.
They didn't really believe me. I could tell.
I'm sure much of America didn't believe it back in February or March. Or even July and August.
But on Tuesday night, Donald Trump took that opportunity and seized it, defeating Hillary Clinton by winning in the states that Democrats thought they had defended, as Republicans not only took the White House, but also kept their majorities in both the U.S. House and Senate.
It wasn't just my friends who didn't believe me about Trump.
I kept hammering my radio stations to understand that this was not some flash-in-the-pan political episode.
Just hours before the polls opened on Tuesday, I wrote my stations a note about Election Day. On Trump, I said:
"Let's re-emphasize something that I would certainly say if my voice worked - at EVERY STEP, we have been told that Donald Trump CANNOT win. He won't win a state. He won't win a primary. He won't get the nomination. And yet he did."
My bottom line - do not assume that he is going to lose.
Back in June, I ran into someone from my neighborhood. "You were right," he said.
"About what?" I had no idea what he was talking about.
"About Trump," he said. "You told me he was going to win, and I didn't believe you."
Many of my friends inside the Beltway didn't believe me. But I had been out there on the campaign trail, and I had seen the crowds and excitement for Trump.
I wasn't sure that he would win. But Trump caught a big break in being able to run against a candidate who was weighed down with all sorts of baggage.
And Trump won. Despite all of his own warts.
And now, he's President-Elect Donald J. Trump.
Soon after I got up this morning, an email arrived from a guy I know.
I had told him in mid-February that Trump could win.
"You called it," he said. "Before South Carolina Primary. I will never forget that."