(CNN) Sen. Elizabeth Warren officially endorsed former Vice President Joe Biden Wednesday morning.

The former 2020 Democratic presidential candidate tweeted out her endorsement with a video message, noting the empathy Biden extends to struggling Americans.

"Empathy matters. And, in this moment of crisis, it's more important than ever that the next president restores Americans' faith in good, effective government," Warren says. "Joe Biden has spent nearly his entire life in public service. He knows that a government run with integrity, competence, and heart will save lives and save livelihoods. And we can't afford to let Donald Trump continue to endanger the lives and livelihoods of every American."

"That's why I'm proud to endorse Joe Biden as president of the United States," she added.

In this moment of crisis, it's more important than ever that the next president restores Americans' faith in good, effective government—and I've seen Joe Biden help our nation rebuild. Today, I'm proud to endorse @JoeBiden as President of the United States. pic.twitter.com/VrfBtJvFee — Elizabeth Warren (@ewarren) April 15, 2020

Biden touted Warren's endorsement on Twitter, writing, "We are in a battle for the soul of this nation and I'm proud to have the fiercest of fighters, Senator @ewarren, on my side. With her help, we're going to beat Donald Trump and create a government that works for everyone — not just the wealthy and well-connected. Let's do this."

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