Sen. Kamala Harris Kamala HarrisHarris faces pivotal moment with Supreme Court battle Nearly 40 Democratic senators call for climate change questions in debates Joe Biden has long forgotten North Carolina: Today's visit is too late MORE (D-Calif.) on Wednesday will announce that if she is elected president she will ban high-capacity AR-15 style assault weapons, an ambitious proposal that adds to a slate of gun control measures that have been backed by the California senator.

A campaign official told The Hill that Harris will make the announcement Wednesday at a campaign stop in New Hampshire.

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The plan will draw on research conducted by former Presidents Clinton and George W. Bush in order to effectively institute a constitutional nationwide ban that is not jeopardized by legal challenges, according to the campaign.

Her reported proposal is a step further from proposals the 2020 Democratic contender announced at a CNN town hall last month, when she endorsed a measure requiring retailers who sell more than five guns per year to conduct background checks on buyers, as well as penalties and fines for gun sellers and manufacturers.

She has also pledged to demand gun control legislation from Congress within her first 100 days in office, while revealing that she herself is a gun owner and distancing herself from what she called a "false choice" on the issue.

Americans, she argued in April, “are being offered a false choice which suggests you’re either in favor of the Second Amendment or you want to take everyone’s guns away."

“I am a gun owner and I own a gun for probably the reason that a lot of people do, for personal safety,” Harris added.

Sen. Cory Booker Cory Anthony BookerBipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE (D-N.J.), who is also running for the White House, previously announced support for a ban on "assault weapons" in a Medium post last week.

Rep. Eric Swalwell Eric Michael SwalwellSwalwell calls for creation of presidential crimes commission to investigate Trump when he leaves office 'This already exists': Democrats seize on potential Trump executive order on preexisting conditions Swalwell: Barr has taken Michael Cohen's job as Trump's fixer MORE (D-Calif.) has also said that gun control will be a central issue in his bid for the White House.

House Democrats passed two gun control bills earlier this year, but neither has been taken up in the GOP-controlled Senate.