“Two years ago, we were a great nation,” Trump said, flanked by more than 30 American flags and banners that read “Make America Great Again”.
“The decline of America is being forced on us.”
Rinehart has yet to make any public comments about her attendance at the event.
She has previously expressed support for Trump’s policies, dating back to his election in 2016.
In a speech to the Institute of Public Affairs (IPA) in September that year, she urged Australia to follow Trump’s lead in cutting red tape and company taxes.
“We need to let our government know this would be good for Australians too,” she said, according to The Australian.
“Unfortunately for Australia, government regulation and red tape is one of our biggest industries and it is growing.”
She also attended a White House state dinner in September 2019, praising a “very important” rare earth materials extraction agreement between Trump and then-prime minister Scott Morrison, according to the Sydney Morning Herald.
Trump made history as the first president to be impeached twice and whose term ended with his supporters violently storming the Capitol in a deadly bid to halt the peaceful transition of power on January 6, 2021.
His 2024 bid announcement came on the back of a lacklustre midterms showing for Republicans, who failed to win back the Senate and were on the cusp of sealing just a narrow win in the House despite predictions of a red wave.
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Many party members and commentators have highlighted the failure of some of Trump’s high-profile picks, such as Mehmet Oz in Pennsylvania and Kari Lake in Arizona.
At the same time, Republicans were praising Florida Governor Ron DeSantis, who was gathering support as a possible 2024 candidate.