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Former US president Donald Trump posted "very realistic and clever satire" in response to Florida Governor Ron DeSantis's glitch-ridden presidential candidacy announcement on Twitter, Sky News Australia host Piers Morgan says.

DeSantis announced he will seek the Republican Party’s nomination for the 2024 election during a Twitter Q&A with the platform’s owner Elon Musk, which was marred with technical difficulties on Wednesday (local time).

"I'm Ron DeSantis, and I'm running for president to lead our great American comeback," DeSantis said in his official campaign video posted to his Twitter account.

DeSantis was due to formally announce his bid for US president in a Twitter spaces session with Musk but the audio stream repeatedly crashed and rebooted before he could even speak.

Mr Trump posted a parody video of Mr DeSantis in response. It featured voice-cloning AI, supposedly matching the likeness of such individuals as Hungarian-American businessman George Soros and World Economic Forum Chairperson Klaus Schwab.

"It's a brilliant fake – it's very convincing," Mr Morgan said.