Former New Jersey Gov. Chris Christie called on former President Donald Trump to redirect the Republican Party in "a new direction" and to encourage party members to treat others with respect, in the wake of the assassination attempt targeting Trump, in a New York Times op-ed published Tuesday.

"Mr. Trump has the opportunity to rein in some of the worst rhetorical impulses of the Republican Party at its convention this week," Christie wrote.

Christie wrote that Trump's selection of Sen. J.D. Vance as a running mate was not in that spirit.

"Mr. Vance's first reaction to the assassination attempt against Mr. Trump was to turn directly to the current, flawed playbook: demonize the other side and lay the blame at the feet of the Democrats, as if they had pulled the trigger themselves. Clearly, this is not a message of unity in the face of what could have been a national tragedy," he wrote.

Christie, who in January suspended his campaign for president, has not endorsed Trump.

He praised Trump's remarks to the New York Post about changing his own speech and looking to foster unity.

-ABC News' Oren Oppenheim

One attendee is committed to dressing as historical figures this convention.

Tonight, he is dressed head-to-toe in a custom uniform at Gen. Nathanael Greene, who served in the Revolutionary War.

"It's to show we're still in the fight," he told ABC News Digital at the convention center.

On Monday, he was Alexander Hamilton and on Wednesday, he will be dressed as Capt. Daniel Boone.

What will his outfit be for Thursday, when Trump accepts the nomination? He says he hasn't decided yet and is "taking requests."

Nevada Senate candidate Sam Brown shared the story of the explosion that nearly killed him in Afghanistan. His recovery, he said, is a story of hope.

"America, I served you a soldier, and I want to serve you again. As a U.S. senator, I will strongly stand alongside Donald Trump to make America affordable, safe and strong again," Brown said. "We have a tough road ahead, but it won't be my first."

Brown urged the audience to look at his face.

"This is the cost of war," Brown said. "If Joe Biden stays in office, more service members will pay this price."

2:00

Afghanistan veteran Sam Brown grips RNC with story of his combat injury

Nevada Senate candidate Sam Brown shared the story of the explosion that nearly killed him in Afghanistan while he was serving.

Hope, he said, has been restored through Trump.

Attendees with cowboy hats and Trump hats alike removed their caps for Brown as he finished his speech, in honor of his service, with a small chant of "USA" breaking out in the arena.

-ABC News' Allie Pecorin and Alexandra Hutzler

Rupert Murdoch arrived in Milwaukee today to attend the RNC, a source familiar with his trip told ABC News.

This could mark the first face-to-face reunion with the former Fox boss and Donald Trump in some time.

Murdoch and Trump had a much-publicized rift in the wake of the 2020 election, and Trump has bashed Fox News as recently as last month.

-ABC News' Olivia Rubin