Policy-wise, she has been a strong voice in the US Senate on financial issues and a self-described defender of the ordinary American against powerful interests.
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.
“Elizabeth grew up on the ragged edge of the middle class in Oklahoma and became a teacher, a law professor, and a US Senator because America invested in kids like her,” it says.
Think of it as testing the political waters before making the big commitment to run as a presidential candidate.
Running an election campaign in the US is mind-bogglingly expensive. Hillary Clinton and Donald Trump raised $1.4bn (£1.09bn) and $957m (£748m) respectively during the 2016 campaign.
So it makes sense to sound out just how much chance a candidate has before they commit themselves to such huge sums of money.
Campaign financing rules in the US are complicated and once a candidacy is officially announced all kinds of limits apply and detailed records of where the money comes from must be kept and reported to the Federal Election Commission (FEC), the government body that supervises elections.
An exploratory committee can spend $5,000 (£3,900) on activities such as, according to the FEC website:
“…permissible testing-the-waters activities include polling, travel and telephone calls undertaken to determine whether the individual should become a candidate.”
Other activities could include lunching with prospective donors or political allies for example.
All of this money can be spent without reporting financial records to the FEC.
The prospective candidate cannot spend over the $5,000 limit. If they do then they are required to register as an official candidate and normal campaign rules apply.
In addition, the FEC also says any of the following marks a transition from exploratory work to official campaign activities.
No, they aren’t obligatory – but they can be useful.
Just the process of announcing an exploratory committee can be beneficial, as reaction to such news can give an indication of a candidate’s popularity.
Right this very second “Elizabeth Warren” is a top Twitter trend in the US and has made the UK top ten, not to mention a slew of news articles.
All of this is effectively free publicity and you can be sure her team are trawling through social media and comment sections looking for insight into how to take the campaign forward, it at all.
Well, she’ll presumably spend $5,000 on a variety of polling and lunching, gauge the reaction and if it seems favourable, launch a campaign to oust President Trump in 2020.
The Massachusetts senator, known as a liberal firebrand in her party, released a video in which she outlines her vision of a path to opportunity for all Americans, not just the wealthy.
“Every person in America should be able to work hard, play by the same set of rules, take care of themselves the people they love,” she said in a Twitter post. “That’s what I’m fighting for, that’s why I’m launching an exploratory committee for president. I need you with me.”