Walz, a former teacher and member of the US Army National Guard, had emerged as a frontrunner in recent weeks. He is seen as a strong candidate who can appeal to rural, white voters and has championed popular progressive policies.
The Harris campaign is expected to officially announce the name of the running mate in a few hours.
‘Weird dudes’
Walz has also gained attention for his effective attacks on Donald Trump and JD Vance, which the Harris campaign has embraced.
He has over the past week delivered a handful of memorable haymakers against Republicans, though his most notable contribution has been a determination to label the GOP, especially its presidential ticket of former President Donald Trump and Ohio Senator JD Vance.
Walz has referred to the duo as “weird dudes”.
The phrase has stuck, becoming a central meme in the new, post-Biden version of the campaign, a development that is delighting Democrats and apparently frustrating many on the right.
A strategic pick
The selection of Walz is seen as a strategic move to boost the Democratic ticket’s chances in key battleground states like Wisconsin and Michigan. Minnesota, while solidly Democratic, is close to these crucial swing states.
Walz’s down-to-earth style and lived experiences that are comparable to many in rural America have helped him connect with ordinary Americans.
He has a proven track record of winning elections in Republican-leaning districts and defending his seat as governor.
The choice of Walz is expected to energise the Democratic base and provide a strong contrast to the Republican ticket.
Harris will begin a tour of battleground states with her new running mate later in the week. On Tuesday, Harris is expected to address a rally in Philadelphia alongside her running mate.