A Trump supporter shakes hands with a man outside the venue for U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

A supporter of U.S. President Donald Trump shoots a video with his mobile phone from the sparsely filled upper decks of the arena as the president addresses his first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

Marc Short, Chief of Staff for Vice President Mike Pence, and Katie Miller, the vice president's press secretary and wife of President Trump's adviser Stephen Miller, who recently tested positive for COVID-19, attend the president's first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

Armed Trump's supporters watch during a protest against racial injustice near the site of a rally by U.S. President Donald Trump in Tulsa, Oklahoma, U.S., June 20, 2020.

A member of an Oklahoma militia group poses for a picture near of the venue for U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

Supporters of U.S. President Donald Trump walk outside the venue for Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

A vendor sells merchandise outside the venue for U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

A police officer shouts at protesters outside the venue of U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

A supporter of U.S. President Donald Trump in the crowd wears a shirt reading "It's OK To Be White" while listening to the president address his first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

A Black supporter of U.S. President Donald Trump holds up a "Make America Great Again" sign as the president arrives at his first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

Supporters look on outside the venue for U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

A man is detained by law enforcement officers during a protest against racial injustice near the site of a rally by U.S. President Donald Trump in Tulsa, Oklahoma, U.S., June 20, 2020.

A young boy wearing a "Make America Great Again" hat and "Trump 2020" button talks to the man carrying him as U.S. President Donald Trump addresses his first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

A supporter of U.S. President Donald Trump listens more than an hour and a half into the president's speech at his first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

Supporters of U.S. President Donald Trump wait for him to appear, 25 minutes before he was scheduled to speak, at his first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

People protest against racial injustice near the site of a rally by U.S. President Donald Trump in Tulsa, Oklahoma, U.S., June 20, 2020.

A child has his temperature checked outside the venue for U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

Oklahoma Highway Patrol troopers stand in front of protesters outside the venue of U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

A demonstrator (front L) argues with a supporter of U.S. President Donald Trump outside the venue for Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

A woman argues with a Trump supporter (not pictured) outside the venue for U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

A protester shouts outside the venue of U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

Supporters of U.S. President Donald Trump scream and cheer without protective masks as the president enters his first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

U.S. President Donald Trump stands at the podium listening to his supporters cheer as he addresses his first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

Supporters listen to the final minutes of U.S. President Donald Trump nearly two hour long speech during his first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

Police officers detain a demonstrator during a protest against racial injustice near the site of a rally by U.S. President Donald Trump in Tulsa, Oklahoma, U.S., June 20, 2020.

A Tulsa Police officer reacts outside the venue for U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

A protester shouts at U.S. President Donald Trump supporters outside the venue of U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

U.S. President Donald Trump speaks at his first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

An Oklahoma National Guard soldier stands outside the venue of U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

U.S. President Donald Trump pumps his fist as he enters his first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

Supporters look on outside the venue for U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

A supporter of U.S. President Donald Trump wears a protective face mask among many other supporters without masks during the president's first re-election campaign rally in several months in the midst of the coronavirus disease (COVID-19) outbreak, at the BOK Center in Tulsa, Oklahoma, U.S., June 20, 2020.

People protest against racial injustice near the site of a rally by U.S. President Donald Trump in Tulsa, Oklahoma, U.S., June 20, 2020.

A supporter of U.S. President Donald Trump talks with a woman during a protest against racial injustice near the site of a rally by U.S. President Donald Trump in Tulsa, Oklahoma, U.S., June 20, 2020.

People argue outside the venue for U.S. President Donald Trump's rally in Tulsa, Oklahoma, U.S., June 20, 2020.

People burn a Trump flag at the protest against racial injustice near the site of a rally by U.S. President Donald Trump in Tulsa, Oklahoma, U.S., June 20, 2020.