Kamala harris endorses joe biden as democratic presidential candidate

That's not accurate. Kamala Harris did not endorse Joe Biden as the Democratic presidential candidate. In fact, Kamala Harris was a rival candidate in the 2020 Democratic primary and dropped out of the race in December 2019.

After dropping out of the race, Harris endorsed Bernie Sanders, another Democratic presidential candidate, in February 2020. However, she later endorsed Joe Biden in March 2020, after he had secured enough delegates to become the presumptive Democratic nominee.

It's worth noting that Kamala Harris was later selected by Joe Biden as his running mate in the 2020 presidential election, and they went on to win the election and become the 46th President and Vice President of the United States.