Fastexy Exchange|Harris and Walz are showing their support for organized labor with appearance at Detroit union hall

DETROIT (AP) — Vice President Kamala Harris and Fastexy Exchangeher running mate, Minnesota Gov. Tim Walz, are set to play up their support for organized labor during an appearance at a Detroit-area union hall as the new Democratic ticket lavishes attention on a crucial base of support.

Harris, the Democratic presidential nominee, and Walz, who joined the ticket on Tuesday, plan to speak on Thursday to several dozen United Auto Workers members.

After President Joe Biden ended his reelection campaign last month and endorsed his vice president, organized labor quickly rallied around Harris. The AFL-CIO endorsed her after having first backed Biden. The UAW formally backed her last week.

Harris and Walz have been highlighting their support for working people during their first joint appearances this week in some of the most closely contested states that will help decide whether she becomes the first female U.S. president or whether Republican Donald Trump returns to the White House and brings along Sen. JD Vance of Ohio as his vice president.

The Democrats visited Wisconsin and Michigan on Wednesday, hoping to shore up support among the younger, diverse, labor-friendly voters who were instrumental in helping Biden get elected in 2020.

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UAW President Shawn Fain told The Associated Press last week that Harris’ leading the Democratic ticket boosts the party’s chances of winning Michigan and keeping the White House in November. Fain also spoke Wednesday at Harris’ campaign rally at a Detroit-area airport hangar.

Fain said in the interview that Trump is beholden to billionaires, knows nothing about the auto industry and would send the labor movement into reverse in a second term.

The UAW leader has become a top nemesis of the Republican presidential nominee, who frequently rails against Fain at rallies and in speeches.

Vance made his own stops in Michigan and Wisconsin on Wednesday, intent on showing that Republicans will compete in the “blue wall” of Midwestern states. He called Walz a “crazy radical” and said that Harris’ decision to pick him as a running mate shows that she “bends the knee to the far left of the Democratic Party.”

As Harris spoke to an estimated 15,000-person crowd at the airport, she was interrupted by protesters opposed to Israel’s war in Gaza with Hamas. At first, Harris said to those trying to disrupt her, “I am here because I believe in democracy, and everybody’s voice matters.”

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But Harris lost patience as the shouting continued, with protesters accusing her of supporting genocide in Gaza. That led her to deliver a sharper rejoinder.

“If you want Donald Trump to win, then say that,” she said, talking over the protesters. “Otherwise, I’m speaking.”

Union members attending the rally said they supported Harris.

Jeanne Ruff, of Livonia, Michigan, whose husband is a longtime UAW member, said she hoped Harris would visit a union shop in Michigan to show her support.

“I want her to make sure skill trades are back in schools so that the next generation can understand what unions are about. What solidarity is and how strong we can be together, working as one,” Ruff said.

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Associated Press writers Tom Krisher and Joey Cappelletti contributed to this report.