Those plans came to light early Monday, when Warren, 69, made an announcement that the Washington Post calls a "legal precursor" to a presidential run. "How did we get here? Billionaires and big corporations decided they wanted more of the pie, and they enlisted politicians to cut them a fatter slice".
Ms Warren has been a frequent sparring partner for Mr Trump, who has repeatedly mocked her claim to have Native American heritage by calling her "Pocahontas", which has been taken as a slur.
Warren is the most prominent Democrat yet to make a move toward a presidential bid and has always been a favourite target of U.S. President Donald Trump.
The 69-year-old, who has represented MA in the Senate since 2013, is a progressive Democrat.
More than a year out from the first round of voting and with months to go until the first debate, the coming Democratic primary is already shaping up to be one of the most fierce and feisty nominating contests in a generation.
Warren passed up the opportunity, but four years later she is now ready - although she will face a much larger field, including possibly other progressivefavorites like Vermont Sen.
By forming an exploratory committee, Warren can start raising money for the 2020 presidential race.
"In our country, if you work hard and play by the rules, you ought to be able to take care of yourself and the people you love", Warren says to open the video, which contains home-video footage of her family. And what I've found is terrifying: these aren't cracks families are falling into, they're traps. "We can and we will". Some two dozen Democrats are expected to run for president this cycle, including a number of women and candidates of color.
In 2017, former Democratic congressman John Delaney of Maryland said he would seek the party's nomination.
Warren won her Senate seat in 2012, defeating incumbent Sen. Edward M. Kennedy and become the first female senator from MA.
"There are different theories on being effective, but she believes in picking issues that are super popular and forging coalitions to win on those issues", he said.
But recent events have illustrated some of her potential weaknesses. Bernie Sanders and rising star Beto O'Rourke, the departing Texas congressman who just lost a bid for the US Senate.
"Warren missed her moment in 2016, and there's reason to be skeptical of her prospective candidacy in 2020", the Boston Globe wrote in a scathing editorial in December.
US Senator Elizabeth Warren (D-MA) speaks at the Netroots Nation annual conference for political progressives in New Orleans, Louisiana. America's middle class is under attack.
She was married at 19, pregnant at 21 and a Rutgers School of Law graduate by 26.
Warren appears to target voters of varied cultural, geographic and economic backgrounds with an anti-corporate, pro-worker message in her initial campaign pitch. Warren is taking the first major step toward running for president.
Those themes were reflected Monday on her website, which portrays Warren as a product of the American dream that has slipped out of reach for too many Americans. A professor turned consumer advocate, she was instrumental in the establishment of the Consumer Financial Protection Bureau, a watchdog agency created in the aftermath of the 2008 financial crisis. She has an advantage in the $12.5 million left over from her 2018 re-election campaign that she could use for a presidential run.
During her years as a senator, Warren is perhaps best known for sharply grilling financial executives. "I think that is not true anymore", Warren told the Daily Beast in 2011.