After Democratic candidate Kamala Harris chose Tim Walz as her vice presidential nominee, Donald Trump’s campaign condemned Walz as a radical liberal and cautioning that their vision would be a nightmare for every American.

"If Walz won’t tell voters the truth, we will: just like Kamala Harris, Tim Walz is a dangerously liberal extremist, and the Harris-Walz California dream is every American’s nightmare," Trump campaign national press secretary Karoline Leavitt told Fox News Digital.

This was in retaliation for Walz’s statement, calling the former president and his running mate JD Vance “weird,” a viral insult the Harris campaign has embraced.

"These are weird people on the other side, they want to take books away, they want to be in your exam room, that's what it comes down to," he said on MSNBC last month. "Don't get sugarcoating this, these are weird ideas."

Giving a comeback, the Republican candidate’s campaign attacked vice president Harris as well.

"It’s no surprise that San Francisco Liberal Kamala Harris wants West Coast wannabe Tim Walz as her running-mate – Walz has spent his governorship trying to reshape Minnesota in the image of the Golden State," Trump campaign national press secretary Karoline Leavitt told Fox News Digital. "While Walz pretends to support Americans in the Heartland, when the cameras are off, he believes that rural America is ‘mostly cows and rocks’."

"From proposing his own carbon-free agenda, to suggesting stricter emission standards for gas-powered cars, and embracing policies to allow convicted felons to vote, Walz is obsessed with spreading California’s dangerously liberal agenda far and wide," Levitt continued.

The 60-year-old is a former congressman and is in his second-term as the governor of Minnesota.

Walz can also showcase a slew of progressive policy victories in Minnesota, including protecting abortion rights, legalising recreational marijuana, and restricting gun access to curb shootings.