Washington (CNN) Author Marianne Williamson's first television campaign ad of the 2020 election cycle focuses on reparations and will run this week in South Carolina -- an early primary state with a crucial black voting bloc.

The Democratic presidential candidate's three-figure ad -- the smallest ad buy of the election cycle -- will run in Columbia, South Carolina, starting Wednesday. It is the first presidential campaign ad on reparations, and will mark a rare mention of reparations in a paid advertisement in a state with a large black voting population in the Democratic primary.

"The first enslaved persons are brought over in 1619, slavery not abolished until 1865. That's 250 years, followed by another hundred years of institutionalized violence against black people," Williamson says in the video.

"That's 350 years of institutionalized violence," she continues. "That's longer than this country has been in existence."

"Paying reparations for slavery will not fix everything," Williamson says. "But America will not have the future that we want if we're not willing to clean up the past, to clean up this original character defect of racism."

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