Those leaders whose main agenda are based on race, cast, religion, gender, class, particular culture are low level politician. They are just an opportunist. True leader should rise above all these (mentioned above) and fight/lead for betterment of humankind, peace n prosperity of everyone.

Joe is running for president cause he thinks blacks are suffering from inequality and white are discriminating them (please see below link). He is just a puppet of Obama. If he wins, America will be divided more. There is no as such division as shown in media (i agree small amout still persists). Current laws doesn't tolarate racial discrimination and will severely punished if found guilty. I've seen this at work place. Obama is chinese/communist agent which will divide US like Gorbachev divided russia.

https://www.pbs.org/newshour/politics/what-motivated-joe-biden-to-run-for-president