NEW YORK (AFP) – Nike’s new marketing campaign built around Colin Kaepernick takes an strong stance on a politically divisive issue in the Trump era, which could score points with millennials but at the risk of alienating conservative customers.

The ads prompted immediate calls for Nike boycotts over Kaepernick, who has been castigated by President Donald Trump and other conservatives over his kneeling protest against police violence.

The sporting goods giant is using the former NFL quarterback as the face of its new “Just Do It” campaign, launched to mark the 30th anniversary of the iconic slogan.

The former quarterback for the San Francisco 49ers, Kaepernick has been effectively blacklisted by the NFL after kneeling during the US national anthem in 2016 in solidarity with the “Black Lives Matter” movement.

“While it is noble to take a stand on something, it is also commercially imprudent to dash headlong into a very sensitive issue which polarizes opinion,” said Neil Saunders, managing director of GlobalData Retail.

“Although the company’s stand may go down well on its native West Coast, it will be far less welcome in many other locations.”

Shares of the blue-chip company were down nearly three percent at $79.85 at midday Tuesday.

But Nike’s move also drew praise in some prominent circles, including former CIA director and leading Trump critic John Brennan, as well as sports journalist Jemele Hill, who have praised Kaepernick for taking a stand against police slayings of unarmed black men.

Picking Kaepernick may turn off some customers, but it likely will strengthen the company’s standing with others, including non-whites and millennials, said Kelly O’Keefe, professor of brand management at Virginia Commonwealth University

“It’s a dangerous move in that I’m certain there is already a boycott under way, but in the case of Nike I think those most likely to boycott are not likely to be their core audience,” O’Keefe said in a telephone interview.

“I think their core audience is likely to be not only supportive of this, but even more enamored of the brand for their willingness to take this stand.”

– Choosing sides? –

While Kaepernick is not an active player for the league, he has nearly two million Twitter followers and his jersey was still the 39th best-seller in last year’s season.

He tweeted the new Nike advert, featuring a close up of his face, with the words: “Believe in something. Even if it means sacrificing everything,” above Nike’s trademark “swoosh” and “Just do it.”

The ad was unveiled just days before the kick-off of the 2018 NFL season on Thursday.

Trump, who has repeatedly and harshly criticized Kaepernick and other NFL players who have protested during the National Anthem as unpatriotic, calling for them to be fired, as of Tuesday afternoon, still had not weighed in.

But he also has taken to Twitter many times to blast companies he views as crossing him, and Texas Republican Senator Ted Cruz said Nike was “on the wrong side of the American people.”

Trump slammed iconic American motorcycle brand Harley-Davidson after it announced plans to move some manufacturing capacity overseas because of tariffs enacted in response to Trump’s tough trade policies.

US political polarization has been a growing issue at advertising industry conferences, prompting debate on whether it is still possible or viable to try to appeal to the entire market and avoid alienating consumers.

Brands like Cheerios and Coca-Cola have faced some blowback over earlier campaigns that expressed support for gays and lesbians and for immigrants.

But Nike’s Kaepernick spot may go further because it could be seen as directly responding to Trump, O’Keefe said.

“I don’t think they (Nike) would have chosen to get into this fight if they could have avoided it,” O’Keefe said. “They have been drawn into this fight.”

One factor in Nike’s move may be the influence of other popular and powerful Nike-sponsored athletes, such as basketball superstar LeBron James, who has frequently clashed with Trump.

Another leading Nike star, Serena Williams praised Kaepernick and fellow former 49er Eric Reid for their political stances at the US Open last week.

Kevin Plank, chief executive of Nike rival Under Armour, faced tough questioning from star athletes including Steph Curry and ballerina Misty Copeland after praising Trump early in his presidency.

But Nike appeared willing to stand by the football player. ESPN reported that Nike had kept Kaepernick, who signed a sponsorship deal with the company in 2011, on its payroll throughout the controversy of the past two years.

“We believe Colin is one of the most inspirational athletes of this generation, who has leveraged the power of sport to help move the world forward,” said Gino Fisanotti, Nike’s vice president of brand for North America.