Tim Walz has blasted the pessimism at the heart of the Republican presidential campaign, accusing former President Donald Trump and his allies of “rooting against America.”

While barnstorming through Pennsylvania on Wednesday, the Democratic vice presidential nominee compared Trump’s vision of America to the dystopia of the “Mad Max” movies.

He said the GOP campaign wants voters to “believe that our political system is broken, to make them believe that things are pessimistic.”

“My God. Every time I hear Donald Trump give a speech, it’s like the next screenplay for ‘Mad Max’ or something.” Walz said. “They’re rooting against America.”

“They do not believe in the exceptionalism of this country. They do not believe in the people who built this country. They simply want to complain about them,” he added.

Trump has returned to the downbeat tone of his 2016 campaign, when the phrase “American carnage” was emblematic.

Eight years later, his messaging is again distinctly doom-laden — referring to a “bloodbath” if he loses and making repeated dehumanizing attacks on immigrants and his opponents. Trump has also rambled about sharks, fictional serial killer Hannibal Lecter and windmills.

Walz also trolled his vice-presidential rival, JD Vance, on Wednesday over the Republican’s now-notorious doughnut store flub, which caught him struggling to engage with a store employee.

“Look at me, I have no problem picking out doughnuts,” Walz quipped while visiting Cherry Hill Orchards in Lancaster, Pennsylvania.