Donald Trump’s State of the Union speech has concluded, but I want to revisit the very beginning of the president’s remarks.

These events usually commence with the following sequence:

The Cabinet comes into the House chamber, along with the Supreme Court and the Joint Chiefs of Staff. Then the sergeant at arms bellows out, “Madam Speaker, the president of the United States.” 

The president walks down the aisle, shaking hands and greeting those who want to be seen in his presence.

Then the president ascends to the podium, hands copies of his speech to the vice president and the speaker of the House.

The president takes the applause. Then the clapping subsides.

Then the speaker usually says something like this: “It is my high honor and privilege to introduce to you, the president of the United States.” Applause commences again.

Except that Speaker Nancy Pelosi didn’t introduce the president.

Donald Trump started his speech right away.

What . . . happened?