Standing in the pulpit where the Rev. Martin Luther King Jr. led the historic Montgomery Bus Boycott, Democratic presidential candidate Hillary Clinton reached out to black voters saying the U.S. is still plagued by injustices such as mass incarceration and attempts to roll back voting rights.

Hillary Rodham Clinton (AP Photo/Morry Gash)

She also urged Americans to rebuild their bonds with one another.

Clinton is working to solidify her advantage over Bernie Sanders among African-Americans.

Black voters could make up more than half of the primary electorate in the early voting state of South Carolina.