A crowd gathers at Boom Island Park to listen to Sen. Thousands of supporters didn't seem to mind.
"She holds the power of the people of Minnesota".
"We are exhausted of the shutdowns and the showdowns, of the gridlock and the grandstanding. Today we say enough is enough".
The 58-year-old enters an increasingly crowded field of Democrats competing to challenge President Donald Trump.
"Well, it happened again. Bad timing. By the end of her speech she looked like a Snowman (woman)!".
Klobuchar, 58, becomes the fifth USA senator and the fourth female member in the chamber announcing a bid for the presidency.
Klobuchar initiated the campaign by singing the national anthem. Huffington Post and BuzzFeed News were among the outlets that quoted former aides who weren't identified.
Klobuchar's team issued a lengthy statement saying she has been "proud" of her staff. She declined to say whether she blamed her opponents for the negative headlines. "I have neighbours. I have all of you". "Yes, I can be tough".
Some Republicans said Klobuchar has been able to get things done by pushing smaller issues. She is considered to have one of the best campaign organizations of any Democrat.
While Klobuchar has positioned herself as the only Democratic candidate able to win back other Midwestern states such as MI and Wisconsin, which were reliably Democratic in presidential races for decades until Trump's victory over Hillary Clinton, that could change as more candidates enter the fold. She became the first Democrat to lose Wisconsin since 1984.More news: In Revolution anniversary speech, Rouhani lays claim to Bahrain, other neighbors
More news: Fitbit has a new tracker, but it’s prescription-only
More news: French 'yellow vest' protester loses fingers in violent clashes
After eight years as county attorney, Klobuchar ran for the Senate seat being vacated by first-term Democrat Mark Dayton, who later won election as governor. Klobuchar won re-election a year ago with over 60 percent of the vote in a state that has voted Democratic at the presidential level in every election since 1976 but only narrowly went for Democratic presidential nominee Hillary Clinton in 2016.
"Minnesota Nice is not going to work on a national stage", Jennifer Carnahan, chair of the state's Republican Party, told the Star Tribune newspaper.
Klobuchar responded to questions about the reports Sunday.
"I don't have a political machine", Ms. Klobuchar said, her hair caked in snow. I don't come from money. But what I do have is this: "grit", Klobuchar said, seemingly proving it by speaking for almost a half hour in a snowstorm with the temperature at minus 9 degrees Celsius.
"I'm not concerned about that". "And it's really important that we hear from all parts of the country and have someone in the White House who has people's backs".
The article cites anonymous sources who describe Klobuchar as "habitually demeaning and prone to bursts of cruelty that make it hard to work in her office for long".
Her father, Jim Klobuchar, now 90, was present at her announcement.
Over the past month, US Democratic Sen. Klobuchar, who just won reelection to her third term in the Senate, has pursued legislative proposals that aim to promote social media advertising transparency and lower prescription drug prices and played a prominent role in the recently passed farm bill. "I think it's cool that there are more women candidates running for president".
Klobuchar's speech on Sunday will lean heavily into her Minnesota roots, including the grit that it takes to draw people to a political event in sub-freezing weather. "Amy showed that the rule of law should still matter and, as she said, the Constitution does not say, 'We the ruling party, ' it says, "We the people'".