President Donald Trump’s criticism of players who protest during the national anthem incited a mass increase in such activism Sunday, with more than 100 NFL players sitting or kneeling, others raising their fists and whole teams standing with locked arms to display unity.

One team, the Pittsburgh Steelers, stayed in the locker room during “The Star-Spangled Banner.”

Last week across the entire NFL, only four players knelt or sat, and two stood with their fists raised. In the nine early games Sunday, AP reporters counted 102 players kneeling or sitting, and at least three raising their fists.

Whole bunch of Patriots players are kneeling. There are some boos in the crowd pic.twitter.com/nLkc6TeQRh

— Ben Volin (@BenVolin) September 24, 2017

A host of Browns players demonstrate pregame in Indy. pic.twitter.com/McNxeMGKvu

— Scott @ WFNY (@WFNYScott) September 24, 2017

A group of Saints players remains seated during the national anthem. pic.twitter.com/3NsTiiBWBK

— Sports Illustrated (@SInow) September 24, 2017

The reactions reverberated across the Atlantic, where about two dozen players, including Baltimore Ravens linebacker Terrell Suggs and Jacksonville Jaguars running back Leonard Fournette, took a knee during the playing of the national anthem before the start of the teams’ game at Wembley Stadium in London.

Other players on both teams and Jaguars owner Shad Khan remained locked arm-in-arm throughout the playing of the national anthem and “God Save The Queen.” No players were kneeling during the British anthem.

Former San Francisco 49ers quarterback Colin Kaepernick was the first athlete to refuse to stand during the national anthem as a protest to police treatment of minorities last year. This season, no team has signed him, and some supporters believe NFL owners are avoiding him because of the controversy.

That protest movement ballooned Sunday following Trump’s weekend rant that began with him calling for NFL protesters to be fired. It continued Saturday with the president rescinding a White House invitation for the NBA champion Golden State Warriors, who had said they were considering not attending.

By Sunday, it was one of the main topics of conversation on social media and around the country.

In Charlotte, North Carolina, more than a dozen New Orleans Saints players sat during the anthem, including star running back Adrian Peterson. In Buffalo, New York, more than half the Denver Broncos knelt during the anthem and a handful of Buffalo Bills sat or knelt.

In Minneapolis, Tampa Bay Buccaneers Mike Evans and DeSean Jackson knelt with the rest of the team locking arms during the “Star Spangled Banner.” The Minnesota Vikings also locked arms. Although no Vikings were spotted taking a knee during the anthem, at least a dozen players sprinted into one end zone and took a knee with head bowed, before the crowd was asked to stand.

On Sunday, NFL owners continued issuing statements condemning the president’s divisive words and players took part in displays of unity across the league. The Pittsburgh Steelers decided to stay in their locker room for the national anthem before their game against the Chicago Bears.

Sports hasn’t been immune from America’s deep political rifts, but the president’s delving into the NFL protests started by Kaepernick brought new attention.

After the Warriors White House invite was rescinded, the National Hockey League’s reigning champion Pittsburgh Penguins announced they did accept a White House invitation from Trump.

In a statement released Sunday morning, the Penguins said they respect the office of the president and “the long tradition of championship team visiting the White House.” The Penguins were honored by Barack Obama after winning the Stanley Cup in 2016 and previously by George H.W. Bush in the early 1990s.

Wading into thorny issues of race and politics, Trump’s comments in a Friday night speech in Huntsville, Alabama, and a series of Saturday tweets drew sharp responses from some of the nation’s top athletes, with LeBron James calling the president a “bum.” Hours later, Major League Baseball saw its first player take a knee during the national anthem.

“Wouldn’t you love to see one of these NFL owners, when somebody disrespects our flag, you’d say, ‘Get that son of a b**** off the field right now. Out! He’s fired,'” Trump said to loud applause Friday night at a rally in Huntsville, Alabama, comments he kept echoing over the next two days.

“If NFL fans refuse to go to games until players stop disrespecting our Flag & Country, you will see change take place fast. Fire or suspend!” the president said in a Sunday morning tweet.

Trump also mocked the league’s crackdown on illegal hits, suggesting the league had softened because of its safety initiatives, which stem from an increased awareness of the devastating effects of repeated hits to the head.

The league and its players, often at odds, have been united in condemning the president’s criticisms, with commissioner Roger Goodell saying Saturday that “divisive comments like these demonstrate an unfortunate lack of respect for the NFL, our great game and all of our players, and a failure to understand the overwhelming force for good our clubs and players represent in our communities.

Treasury Secretary Steven Mnuchin defended Trump’s attacks Sunday, saying on ABC’s “This Week” that the president thinks “owners should have a rule that players should have to stand in respect for the national anthem.” Mnuchin added that “they can do free speech on their own time.”

New England Patriots owner Robert Kraft, who’s been a strong supporter of the president, expressed “deep disappointment” with Trump on Sunday.