2020 hopeful Biden set to outline vision for uniting America

Democratic presidential candidate Joe Biden is set to outline his vision for unifying the country in a high-profile speech in Philadelphia, the city where his campaign has its headquarters.

Biden's campaign says the speech will focus on his "vision for unifying America with respected leadership on the world stage — and dignified leadership at home."

The 76-year-old former vice president has leapt to the front of the crowded Democratic primary, in part by highlighting his ability to compete with President Donald Trump in pivotal states such as Pennsylvania, Michigan and Wisconsin.