During a tour of the U.S. Senate with reporters before leaving office, on December 5, 2016, Biden said that a presidential bid was possible in the 2020 presidential election, after leaving office as Vice President.
If he were to run in 2020, Biden would be 77 years old on election day and 78 on Inauguration Day in 2021.
While on the The Late Show with Stephen Colbert on December 7, in which he stated "never say never" about running for President in 2020, while also admitting he did not see a scenario in which he would run for office again.
On January 13, 2017, exactly one week before Donald Trump took office, that he would not run.
However, four days later, on January 17, he took the statement back, saying "I'll run if I can walk."

Biden was mentioned by many news media as a potential candidate for the 2020 Democratic nomination.
In March 2019, he said he may run.

He formally launched his campaign on April 25, 2019.

In April 2020, Biden became the only candidate in the primary making him the presumptive nominee for the nomination.
At first, he lost the first three primary contests to Senator Bernie Sanders.
After winning the South Carolina primary, he gained traction and won most of the Super Tuesday races.

Biden promised when elected he would protect Roe v. Wade decision, create a public option for health insurance, decriminalization of recreational cannabis, passing the Equality Act, free community college, and a $1.7 trillion climate plan supporting the Green New Deal.
He supports regulation instead of a complete ban on fracking.

In early 2020, Biden promised he would pick a woman as his running mate.
In August 2020, he picked California U.S. Senator Kamala Harris as his running mate.
During a tour of the U.S. Senate with reporters before leaving office, on December 5, 2016, Biden said that a presidential bid was possible in the 2020 presidential election, after leaving office as Vice President. If he were to run in 2020, Biden would be 77 years old on election day and 78 on Inauguration Day in 2021. While on the The Late Show with Stephen Colbert on December 7, in which he stated "never say never" about running for President in 2020, while also admitting he did not see a scenario in which he would run for office again. On January 13, 2017, exactly one week before Donald Trump took office, that he would not run. However, four days later, on January 17, he took the statement back, saying "I'll run if I can walk."
Biden was mentioned by many news media as a potential candidate for the 2020 Democratic nomination. In March 2019, he said he may run. 
He formally launched his campaign on April 25, 2019.
In April 2020, Biden became the only candidate in the primary making him the presumptive nominee for the nomination. At first, he lost the first three primary contests to Senator Bernie Sanders. After winning the South Carolina primary, he gained traction and won most of the Super Tuesday races. 
Biden promised when elected he would protect Roe v. Wade decision, create a public option for health insurance, decriminalization of recreational cannabis, passing the Equality Act, free community college, and a $1.7 trillion climate plan supporting the Green New Deal. He supports regulation instead of a complete ban on fracking.
In early 2020, Biden promised he would pick a woman as his running mate. In August 2020, he picked California U.S. Senator Kamala Harris as his running mate.
Joe Biden