Elizabeth Warren makes her 2020 candidacy official, reveals which powerful Democrat has already endorsed her

It's official: Sen. Elizabeth Warren (D-Mass.) is running for the 2020 Democratic presidential nomination.

Warren's announcement comes a little more than one month after she announced an exploratory committee, the first step major candidates take when considering a run for president.

What are the details?

Speaking at her campaign launch event in Lawrence, Massachusetts, on Saturday, Warren vowed to "fight to build an America where dreams are possible, an America that works for everyone."

"I am in that fight all the way," she told supporters. "And that is why I stand here today: to declare that I am a candidate for President of the United States of America."

To no surprise, Warren drew sharp contrasts between herself and President Donald Trump, painting the president as a cancerous disease, while promoting her progressive agenda as the anecdote America desperately needs.

"It won't be enough to just undo the terrible acts of this administration. We can't afford to just tinker around the edges — a tax credit here, a regulation there. Our fight is for big, structural change. This is the fight of our lives," she said, according to CNN.

Warren's announcement comes on the heels of two other major candidates announcing their presidential campaigns. Sen. Kamala Harris (D-Calif.) announced her campaign last month, while Sen. Cory Booker (D-N.Y.) announced his candidacy this week. Sens. Bernie Sanders (I-Vt.) and Amy Klobuchar (D-Minn.) are also expected to announce campaigns in the coming months. In all, the race for the 2020 Democratic presidential nomination may be the most crowded field in U.S. history.

What issues will Warren's campaign focus on?

Vox.com explains:

Warren's platform will focus on many of the same issues she's worked on since she was a Harvard Law School professor who helped President Barack Obama create the Consumer Financial Protection Bureau after the 2008 recession: cracking down on big banks, making corporations more accountable to workers, and expanding health care and housing for the middle class and low-income Americans.

Who endorsed Warren?

Rep. Joseph Kennedy (D-Mass.) — the grandson of former Attorney General Robert Kennedy and grand-nephew to former president John F. Kennedy and Sen. Ted Kennedy (D-Mass.) — introduced Warren Saturday and revealed his endorsement of Warren.

The Boston Globe first reported Kennedy's endorsement on Friday.