CLEVELAND — The Trump campaign has lately alternated between disaster and farce: the awkward rollout of Mike Pence, parliamentary disputes on the convention floor, a muddled message, a plagiarized speech by the candidate’s wife.

But in one respect, the Republican National Convention of 2016 has been a “yuge” success. It is the triumph of narcissism.

Addressing the convention Monday night, after an entrance lit in silhouette: Donald Trump.

Addressing the convention Tuesday night via video from Trump Tower: Donald Trump.

Promising to address the convention Wednesday night: Donald Trump. Accepting the nomination Thursday: Donald Trump.

Midway through the 8 p.m. hour of Monday’s programming at the convention, Patricia Smith, whose son was killed in the Benghazi terrorist attack, spoke emotionally about how “I blame Hillary Clinton personally for the death of my son.”

But her speech was pre-empted. Fox News’ Bill O’Reilly, citing a “breaking-news situation,” cut off convention coverage to interview the candidate. Trump’s “breaking news” turned out to be little more than a denunciation of Ohio Gov. John Kasich for skipping the convention.

Upstaging his own convention speakers? Classic Trump: Self-worship over good judgment.

For weeks, Republican leaders pleaded with Trump to build a professional operation, but his campaign resisted, saying he didn’t need to act like other politicians. Now we see the consequences: a convention rally of conspiracy theorists, co-hosted by Trump’s longtime political adviser; a needless floor fight over convention rules in which the hapless presiding officer, a back-bench congressman, walked off the stage; and plagiarized phrases in a speech by the would-be first lady that went unvetted by Trump’s thin staff.

Trump allies variously said there was no plagiarism, that only 7 percent of the speech was plagiarized, and that a part of the Michelle Obama speech that Melania Trump lifted from was itself purloined from radical leftist Saul Alinsky.

Trump packed the week’s prime-time speakers list with low-wattage names unlikely to upstage him – celebrities along the lines of Scott Baio – Chachi of “Happy Days” fame. The top-billed speakers: Melania Trump (Monday), Tiffany Trump and Donald Trump Jr. (Tuesday), Eric Trump (Wednesday), Ivanka Trump (Thursday) and, of course, Donald Trump (always).

The shootings of police in Dallas and Baton Rouge gave Republicans an opening to try to establish themselves as the party that will keep Americans safe. Monday night’s program was, shrewdly, packed with law enforcement and military types, numerous “victims of illegal immigrants” and former New York Mayor Rudy Giuliani, who fired up the delegates.

But then the sound system blasted Queen’s “We Are the Champions,” and Trump made his entrance. “Oh, we’re going to win, we’re going to win so big,” he said. “We’re going to win so big. … We’re going to win so big.”

Melania Trump made only one passing reference to the night’s theme of security. She spoke, rather, about her husband’s manifest greatness: “He will do this better than anyone else can, and it won’t even be close.”

His children attested Tuesday that “his desire for excellence is contagious” (Tiffany Trump) and that “we’re the only children of billionaires as comfortable in a D10 Caterpillar as we are in our own cars” (Donald Jr.).

Trump’s personal greatness was, likewise, the theme of his Pence rollout Saturday, when he went on, mostly about himself, for 4,000 words before yielding to his vice-presidential nominee: “I’ve been a very, very, very successful businessperson. … I won in landslides. … I dominated with the evangelicals.”

The situation was much the same Sunday on “60 Minutes.” When Lesley Stahl called him “brash,” Trump countered that he’s “religious.” How’s that? “I won the evangelicals.”

Stahl observed that “you’re not known to be a humble man.”

Volleyed Trump: “I’m much more humble than you would understand.” Seconds later, he said that people tell him “you’re going to go down in the history books.”

There are signs of delegates’ misgivings about their narcissistic nominee: The convention floor is quieter than usual, the roll call lethargic, the Trump merchandise booths uncrowded.

Perhaps some of them can remember, eight years ago, when their nominee, a war hero, spoke of serving a “cause greater than self.” For Trump, this is impossible. There is no cause greater than himself.

Dana Milbank is a columnist for The Washington Post. He can be contacted at:

dana.milbank@washpost.com