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Minnesota Sen. Amy Klobuchar spoke to ABC News Live about her reaction Gov. Tim Walz being selected as Vice President Kamala Harris' running mate.

The senator called Walz a "close friend," and said Harris chose the governor for several major reasons.

"She had someone in Tim Walz that one, she trusted, [and] two, she saw as someone that is going to bring something else to this ticket in a big way," Klobuchar said.

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Sen. Amy Klobuchar reacts to Harris’ running mate pick Gov. Tim Walz

The Minnesota senator, who describes Tim Walz as a “close friend,” gave her thoughts on Vice President Kamala Harris picking the Minnesota governor as her running mate.

ABCNews.com

The senator said Walz's experiences as a veteran, teacher, Congress member and governor help the ticket.

"I just like Tim Walz. He is a good leader, he has shown he can get things done across the aisle," she said.

When asked about the criticism Walz received over his handling of the COVID-19 pandemic, Klobuchar said, "We came out of it strong."

Klobuchar also addressed the criticism Walz received over the 2020 George Floyd protests, reiterating that the governor embraced peaceful protests but called in the National Guard when they got violent.

"I would like to add, he was someone when the 'defund the police' ballot measure was on the ballot in the city of Minneapolis, both of us strongly opposed the measure. He added funding for the police," she said. "You will see someone who has actually stood with law enforcement and made some tough decisions."

Republican vice presidential nominee Sen. JD Vance responded to the news of Gov. Tim Walz being tapped as Kamala Harris' running mate, claiming the decision highlights how "radical" Harris is.

"Obviously, the big news of the day is that Tim Walz has been nominated as the VP or is now the presumptive nominee, I should say, for Kamala Harris ... My view on it is it just highlights how radical Kamala Harris is," Vance said.

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JD Vance slams Harris as ‘radical’ for her VP pick

Vice presidential candidate JD Vance spoke to reporters in Philadelphia about Kamala Harris’ choice for running mate.

ABCNews.com

When asked by ABC News' Hannah Demissie if he had been in contact with Walz, Vance said he called Walz but the governor didn't answer, so he left a voicemail.

"I didn't get him, but I just said, 'Look, congratulations. Look forward to a robust conversation and enjoy the ride,' And maybe he'll call me back, maybe he won't," Vance said.

-ABC News Lalee Ibssa

President Joe Biden spoke with Vice President Kamala Harris on Monday morning before she announced that Gov. Tim Walz would be her running mate, the White House said in a statement.

"The President also spoke with Governor Walz to congratulate him on his selection," White House Senior Deputy Press Secretary Emilie Simons said in a statement.

-ABC News' Justin Gomez

President Joe Biden, who changed his X header to match the new Harris-Walz logo, praised Vice President Kamala Harris' pick of Gov. Tim Walz as a running mate, calling him "a strong, principled and effective leader."

"The first major decision a party nominee makes is their choice for Vice President. And Kamala Harris has made a great decision in choosing Governor Tim Walz to be her running mate," he said in his statement on X.

"The Harris-Walz ticket will be a powerful voice for working people and America's great middle class. They will be the strongest defenders of our personal freedoms and our democracy. And they will ensure that America continues to lead the world and play its role as the indispensable nation," the president added.

Biden called on all Americans to rally behind the Harris-Walz ticket.

"Every generation of Americans faces a moment where they are asked to defend American democracy. That moment is now," he said.

-ABC News' Fritz Farrow, Gabriella Abdul-Hakim and Will McDuffie