Business Insider noted that in 2019, Republican New Hampshire Gov. Chis Sununu was vocal in his praise for then-President Donald Trump, referring to himself as a "Trump guy through and through."

Yet in a major reversal, Sununu has come out against Trump's third presidential run, complaining that he "doesn't have the energy."

Sununu says Trump has lost his "fastball"

According to The Guardian, Sununu's comments came this on Sunday during an interview with ABC News' "This Week."

"This is not the Donald Trump of 2016, don’t fool yourself," the New Hampshire governor complained to host Jonathan Karl.

“This is not the Donald Trump of 2016,” GOP Gov. Sununu tells @JonKarl.

“He doesn’t have the energy…He basically is droning on for 90 minutes on his long form speeches about his legal battles as opposed to talking about the future of this country.” https://t.co/szX6hFTOyO pic.twitter.com/6qN0nafyP8

— This Week (@ThisWeekABC) July 30, 2023

"He doesn’t have the energy, he doesn’t have the fastball, he basically is droning on for 90 minutes in his long-form speeches about his legal battles, as opposed to talking about the future of this country," Sununu went on to allege.

"Ever seen a soap opera?" the Republican state leader asked. "They get kind of boring. The only thing worse is the rerun of a soap opera. And that’s what he’s bringing. A lot of drama to the table."

Chris Christie attack Trump over document charges

Sununu was not alone in leveling attacks against Trump this weekend, as former New Jersey Republican Gov. Chris Christie did so as well in an appearance on CNN "State of the Union."

Specifically, Christie once again took aim at Trump over the federal charges brought against him by Special Counsel Jack Smith regarding his handling of classified documents.

"The 'I can declassify whatever I want' defense is not a defense."

GOP presidential candidate Chris Christie responds to the new obstruction charges the Justice Department leveled against former President Donald Trump in the classified documents case. @CNNSotu #CNNSOTU pic.twitter.com/Ajlct2JXHj

— CNN (@CNN) July 30, 2023

"The 'I can declassify whatever I want' defense is not a defense," Christie insisted. "You can declassify whatever you want when you’re president."

Poll shows Trump with massive lead among primary voters

"You can’t do it by thinking about it, you can’t do it by mind melding with the documents. There’s a process you have to go through to declassify, and he knows that," Christie continued.

However, attacks by Trump's critics don't appear to be impacting his race for the Republican Party's presidential nomination.

A recent New York Times/Siena College poll showed Trump as being supported by  54% of likely primary voters, putting him a full 37 points ahead of Florida Republican Gov. Ron DeSantis.