The Asian carp of politics takes over Republican waters: Michael Enright

Clevelandis a modest industrial city of just under 400,000 souls, sitting on the south shore of Lake Erie.

The lake is famous for nearly suffocating in algae blooms in the 1960s, and for the looming threat of invasion by themonstrous giant Asian carp, which frantically seeks out its prey and mercilessly destroys everything within its dim visual range.

• Trump riding the monster the Republicans created: Neil Macdonald
• Trump's war on political correctness redefining U.S. race

Donald Trump is to the Grand Old Party of Republicans what the Asian carp is to Lake Erie.

The Republican Party elites and old-line power brokers see him as a destroyer of worlds their world.

His supporters see him as the Promised One who will, in his very own words,make America great again.

Some 50,000 people including 15,000 media zebra mussels from around the world will embrace Cleveland for the four days of theRepublican National Convention.

Mr. Trump will be crowned theparty's presidential nomineeon Thursday as he picks up the war mantle to do battle with Hillary Clinton from now until voting day, Nov. 8.

Some diehardshad hoped for and indeed predicted a deadlocked convention wherein Mr. Trump would be unhorsed and replaced by someone more, ahem, presentable.

Not going to happen.

• How the 'last-ditch' plot to dump Trump may have just died
• Trump's VP pick of Mike Pence could boost his campaign, for now

There has never been a Republican convention quite like this one because there has never been a Republican nominee quite like Donald Trump.

The last open or brokered convention among Republicans was in 1976, the country's bicentennial in Kansas City.

The sitting president, Gerald Ford, was challenged by actor-governor Ronald Reagan of California.

Reagan argued that because he had done well in his home state Illinois primary and won in North Carolina, he should be the nominee.

Ford,who succeeded RichardNixon after his resignation, was considered a bumbler and potential loser.

In the end, Ford won the nomination, but in an impromptu speech to the delegates Reagan got a standing ovation.

Many in the hall felt they had nominated the wrong man.

Donald Trump, thegaudy entrepreneur and reality TV celebrity, has more than the 1,237 plus one votes needed to clinch the nomination.

His successful procession to the nomination has been as unlikely as it has been unprecedented.

A year ago he was dismissed as a blowhard adventurer and vulgarian with little interest in being the nominee.

After a bitter and bruising primary and caucus campaign season in which he defeated no less than 17 Republican challengers, heis in sight ofchanging or sinking not only the Republican Party but the entire American conservative movement.

There is little in the Trump biography that fits the traditionally understooddriversof modernU.S.politics.

Unlike hisforebears, he comes to the nomination without any experience in either elective office or the military.

Once a Democrat, he has contributed to the party andnumbered among his friends the party powerful, including Bill and Hillary Clinton.

His success has been remarkable. With every outrageous Trumpian utterance, the commentariat vigorously predicted his political demise.

Hard-hit middle class

In the end, nearly14 millionAmericans voted for him.

Middle America, seen as frustrated, adrift, confused and above all angry, very angry, was buying the wholesale version of Trump's new, robust America First republic.

It didn't seem to matter to them that a Trumpadministrationwould lower the minimum wage, build a border wall to keep out Mexicans, ban all Muslims from the U.S., limit the reproductive options of women, and tear up trade agreements and treaties, including the one stalling Iran's nuclear plans.

The party elites, including former presidents, former governors, and former nominees, cry out that Trump is destroying the Republican legacy of Lincoln and Reagan.

The Trump camp returns fire, saying that rather than destroying the GOP, he is revivifying its brand among the hard-hit and hard-scrabble middle class.

The Cleveland that welcomes press and politicians this week is a city divided, perhaps reflecting the divisions within the country itself.

Relations between blacks and police arefraught with the same tensionsnow familiar in Dallas, Baton Rouge and St. Paul.

In 2012, an unarmed black couple was shot to pieces by police who fired 137 rounds into their car following a high-speed chase.

And in November 2014, 12-year-old Tamir Rice was playing with a toy pistol when he was shotdeadby a white cop.

Industrial Ohio and Cleveland were devastated by the economic collapse of 2008. But long before that, thousands of jobs were lost as Ohio's once well-established manufacturing infrastructure was being hollowed out.

The city is only now slowly recovering. Optimism returned with the victory of the NBA Cavaliers, bringing to Cleveland its first sports championship in 52 years.

For the party faithful and for the party itself, the GOP is meeting in Cleveland at a time of existential trial.

In 2012, in the aftermath of the Mitt Romney debacle, the party's so-called "autopsy report" called for the creation of a big new tent. Reach out to Hispanics, women, black and other minorities with policies and programsthat reflect what George W. Bush used to call "compassionate conservatism." And above all, as Louisiana governor Bobby Jindal put it: "Stop being the party of stupid."

Butthatbig tent seems a bit torn and tattered as the GOP continues its TeaParty-driventriumphs as the rejectionist, nativist client cartel of the National Rifle Association and the Koch brothers.

Rank and file Republicans are coming to Cleveland looking for a saviour.

The few remaining party moderates are hoping for a statesman.

Meanwhile, out in the darkly quiet depths of the great lake, a sliver of hope in the war against the dreaded Asian carp.

The last one caught was sterile.

• Trump's conga line to Demagogue City rollicks on: Neil Macdonald
• Donald Trump on Muslims, and other hair-raising quotes