While she touched on a variety of issues where she differs from the president, Klobuchar didn't name Trump in her almost half-hour speech.
The Minnesota Democrat began her candidacy in front of a crowd of supporters gathered at Boom Island Park along the Mississippi River near downtown Minneapolis.
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.
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".
Klobuchar now joins prominent Democratic figures who have announced presidential bids including Indian American Kamala Harris, New Jersey's Cory Booker, New York's Kirsten Gillibrand and Massachusetts' Elizabeth Warren. They include Elizabeth Warren of Massachusetts, Kamala Harris of California, Cory Booker of New Jersey and Kirsten Gillibrand of NY. "It is time to organize, time to galvanize, time to take back our democracy". She's been a U.S. Senator since 2006.
She won praise for grilling Supreme Court Justice Brett Kavanaugh and attorney general nominee William Barr during recent confirmation hearings.
In the tweet, Trump said the senator looked like a "Snowman (woman)" because she was standing in a "virtual blizzard". "I don't know that coming from Minnesota gives her any advantage with Iowans".
"It would be cool to have a woman president from Minnesota", said Cyrus Brave Heart, who turns 18 in March and is excited to vote in the next presidential election. "I thought it was really cool".
The Huffington Post reported last week that Klobuchar's reputation had scared off three people from leading her presidential campaign. "Looking forward to debating you about climate change (and many other issues)".
To win the democratic nomination, Klobuchar will need to do well in the Iowa caucus, said Larry Jacobs, a professor at the University Center for the Study of Politics and Governance.
There is also widespread speculation that former Vice President Joe Biden could enter the field.
She's has been seen as a Democratic rising star, even though her time in an increasingly partisan Senate has yet to see her emerge as the author of grand legislation.
"I think you want voices from places where Donald Trump did very well", she said.
"If you just go in your opposite corner of the boxing ring, you never get anything done", she said on ABC's "The View" late previous year. Amy Klobuchar's (D-Minn.) nascent 2020 presidential campaign - and done so in part because of Klobuchar's history of mistreating her staff, HuffPost has learned. After living with the orange rage of Trump, Klobuchar's "Minnesota-nice" persona is a welcome relief.
After working as a lawyer in a private firm, she became chief prosecutor for Hennepin, Minnesota's most populous county, in 1998. "I have I'd say high expectations for myself, I have high expectations for the people who work for me, but I have high expectations for this country". Eight of Klobuchar's nine appearances on the Sunday shows in 2018 occurred in the last nine months.