Liberal superhero Justin Trudeau is not immune to the forces of Trump

You know him as the man who can break the Internet with a single photo. Canadian Prime Minister Justin Trudeau swept into office in 2015 with a promise of "sunny ways" and "positive politics" for a country feuding over religion, taxes and the military.

But a now series of scandals -- and a new neighbor in the White House -- have ushered in a good dose of gloom.

"He has enjoyed an historic and exceptional honeymoon," pollster Nik Nanos of Nanos Research said. "Now, the shine is off."

With his popularity slipping and the challenges of Donald Trump's administration mounting -- the two leaders are due to meet Monday at the White House -- Trudeau might well be sensing a storm.

Here's how he got to this point:

From bouncer to Prime Minister

His jobs have varied from nightclub bouncer to teacher. A married father of three, Trudeau is an avid athlete who runs, skis, surfs, boxes -- he's even mastered yoga. And from his shirtless encounters with strangers to an official visit with a blushing Catherine Duchess of Cambridge, Trudeau has charmed the world one selfie at a time.

Justin Trudeau, Prince William the Duke of Cambridge, Sophie Gregoire Trudeau and Catherine the Duchess of Cambridge take a walk in Vancouver, on September 25.

Elected to Parliament in 2008, he became Canada's prime minister in November 2015 with a liberal message of inclusion. At age 43, he assumed the office his father, Pierre Trudeau, held decades earlier.

Not so 'sunny': Elbowgate, Castro and chopper rides

The afterglow burned for months. Then came Elbowgate.

It was a jaw-dropping counterpoint to Trudeau's carefully cultivated image of calm. And it was all caught on camera.

In May 2016, while debating a contentious piece of legislation on assisted suicide, Trudeau "manhandled" a member of Parliament and elbowed another, apparently swearing as he went.

Opposition: Trudeau "elbowed" female lawmaker 02:37

He apologized, twice, and the negative attention was mostly limited to Canada.

No such luck for Trudeau's next misstep.

As the world reacted to the death of Fidel Castro, Trudeau said in a statement that the Cuban leader had been a "larger than life leader who served his people." He left out any mention of Castro's record on human rights and his history of oppression.

Trudeau defends his tribute to Castro. 01:10

The criticism poured in. #TrudeauEulogies started trending, with mock tributes to despots past and present. In the end, Trudeau agreed that Castro was a dictator.

Even before that ruckus could die down, Trudeau found himself in the middle of yet another scandal. His office confirmed that the Prime Minister spent his winter holiday on the private island of the Aga Khan -- and used the billionaire religious leader's private helicopter to get there. An ethics investigation is underway.

And no sooner had the new year begun than tragedy struck in Quebec City, where a local college student allegedly shot to death six men at a mosque. It was one of the worst attacks to target Muslims in a Western country.

Make Trudeau great again

Trudeau used the massacre to double down on his message of inclusion. "Muslim-Canadians are an important part of our national fabric," he said.

Trudeau speaks during a rally near the Islamic Cultural Center in Quebec City on January 30.

The attack came as Trudeau, aware of his waning popularity and aiming to shed the label of "limousine liberal," embarked on a cross-country town hall road show.

He got grilled, heckled and yelled at.

But some commentators saw it as a successful act of contrition after several weeks of damaging missteps.

"That's why he did this incredible tour of the country that no one's ever seen before," said Craig Oliver, chief political commentator for CTV News.

"He's authentic," said Oliver, who has known Trudeau since childhood. "He has real good instincts about people and about politics."

'Sunny ways' still under threat

As he works to dig out of his domestic rut, Trudeau faces new threats to his progressive politics. There's still a strain of nationalist populism that runs deep in Canada.

Oh, and then there's Donald Trump.

Former Vice President Joe Biden suggested weeks before he left office that Trudeau, along with German Chancellor Angela Merkel, would inherit the liberal mantle from former President Barack Obama.