Ms Klobuchar said she would "lead from the heart" and look out for the interests of everyday Americans if she was elected president.
Minnesota Republicans, with a poor record against Klobuchar, have tried nonetheless to blunt her announcement, portraying her as overly cautious and perhaps not up to a nationwide challenge.
Klobuchar emphasized her background as a homegrown Minnesotan, the daughter of a journalist and union worker whose grandfather worked in the Iron Range mines, before sharing stories of hardworking people across the country.
Though Klobuchar does not have the name recognition of some of her rivals for the nomination, she's well known within L.A. donor circles, having raised money for her Senate campaigns in the city and because of her position on the Senate Judiciary Committee.
But Republican Party of Minnesota Chairwoman Jennifer Carnahan criticized Klobuchar's decision to run for president so quickly after Minnesota voters re-elected her to a six-year term in the U.S. Senate.
A former prosecutor and corporate attorney, Klobuchar joins a list of Democratic hopefuls that includes fellow Senators Cory Booker of New Jersey, Kamala Harris of California, Kirsten Gillibrand of NY and Elizabeth Warren of MA. They both spend a great deal of time on the East Coast -John Bessler is a law professor at the University of Baltimore - but come back to Minnesota when Congress is out of session for a big family Thanksgiving.
A talented orator with a flair for the dramatic, he drew attention for his performance during confirmation hearings of Trump Supreme Court nominee Brett Kavanaugh. Tina Smith, Gov. Tim Walz and Lt. Gov. Peggy Smith threw their support behind Klobuchar on Sunday.
"I'm continuing to talk to people about it", she said.
The 49-year-old U.S. senator from New Jersey announced his candidacy February 1, evoking the civil rights movement as he promised to work to bring together a divided America.
"She has her upside, but I really, really need to see her turn around on her very hawkish foreign policies", said Madden. She attended the event to learn more about Klobuchar.
In her announcement speech, Klobuchar said she wants to rejoin the Paris Climate Accord "on day one" of her prospective presidency, reversing one of Trump's most contentious decisions.
The three-term senator says her broad appeal in Minnesota could translate to other Midwestern states such as Wisconsin and MI, which have been reliability Democratic for decades but backed Trump over Hillary Clinton in 2016.
"Looking forward to debating you about climate change (and many other issues)", she wrote.
She added: "But that sense of community is fracturing across our nation right now, worn down by the petty and vicious nature of our politics". Former vice president Joe Biden and Beto O'Rourke are other strong candidates who are likely to announce them running for presidency soon.
After working as a lawyer in a private firm, she became chief prosecutor for Hennepin, Minnesota's most populous county, in 1998.
Klobuchar responded to questions about the reports Sunday. "I don't feel like she's the kind of person that's going to get people super excited at a rally".
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