Andrew Duncan, identified as a "producer and activist" by journalist Yashar Ali, bought 300 seats for Chinese pro-democracy activists to protest at NBA game.
Hong Kong Chief Executive Carrie Lam pulled out of the meeting when she discovered that Ted Cruz had told reporters about the plans.
The demonstrator's sign has resonated with many fans of J.K. Rowling's series.
Kerr later said he wasn't going to comment any further about the Hong Kong protests.
"We have verified with the Hong Kong Cybersecurity and Technology Crime Bureau that the app has been used to target and ambush police," Apple said in a statement.
The league's response to Morey's tweet, which has inflamed tensions in a key basketball market, has generated its own backlash in the U.S.
It follows tweets made by Houston Rockets general manager Daryl Morey in support of Hong Kong protesters.
More than 75 mosaics of comprised of posters, flyers and Post-it notes have sprung up across public spaces in Hong Kong, reiterating protesters' calls for democracy and denouncing China's efforts to bring the former British colony to heel.
The Hong Kong chief executive bowed to months of pressure and withdrew the controversial bill on Wednesday.
Joshua Wong and Agnes Chow were arrested on Friday morning. They were later released on bail.
20 Cathay employees have been dismissed or forced to resign.
The photo was taken on Sunday evening, during a clash between police and protesters in the Tsuen Wan area of Hong Kong.
Protesters threw bricks and gasoline bombs at the police, who responded with tear gas.
A spokesperson for the Chinese government said Taiwan's offer "helped cover up the criminalities of a small number of violent radicals" and offered them safe haven.
Protesters chanted: "Liberate Hong Kong! Revolution of our time!" despite fears that police could adopt tougher tactics to drive activists off the streets.
"I support Hong Kong Police, you can beat me now," the Disney star reportedly said.
"The president has made it clear that he is watching very carefully what's happening," Ross said. "He talked about the possibility of troop build-up and it's not that we are not watching it, it's a question of what role is there for the U.S. in that matter. This is an internal matter."
Protesters fear 'Chinese methods' will be applied In Hong Kong
Hong Kong urged pro-democracy protesters to pack up their tents and leave their main camp near government headquarters, saying it could not promise there would be no "confrontations."
Hong Kong police announced plans to clear away the last of the "Occupy" protest encampments, setting up what could be a final showdown with pro-democracy activists on Thursday.
The government and now the courts are cracking down on the protests
The protests have been met by plenty of authoritarian rhetoric from the government
The three co-founders of Occupy Central have said they will hand themselves in to police tomorrow