WASHINGTON, April 25 (Xinhua) -- Former US Vice President Joe Biden officially launched his 2020 presidential run on Thursday.

Former Vice President of US, Joe Biden, speaks on stage during The 2019 Biden Courage Awards, New York City, March 26, 2019. (File Photo: CGTN)

"The core values of this nation, our standing in the world, our very democracy, everything that has made America America is at stake," Biden said in an online video.

"That's why today I'm announcing my candidacy for president of the United States," he said.