Sen. Kamala Harris (D-Calif.) on Friday blasted President Trump's plan to build a wall along the U.S.-Mexico, calling it "a stupid use of money."

Harris made the comment during a town hall in Los Angeles, saying she would vote against border wall funding, which she echoed in a tweet.

Indivisible member asks @SenKamalaHarris to pledge to vote against border wall funding. “Yes,” she said. “It’s just a stupid use of money.” — Sarah D. Wire (@sarahdwire) April 21, 2017

Trump’s border wall is just a stupid use of money. I will block any funding for it. — Kamala Harris (@KamalaHarris) April 21, 2017

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Her remark came after Trump's budget chief Mick Mulvaney said earlier Friday that the White House was offering Democrats money for key ObamaCare payments in exchange for money to help fund the president's proposed border wall.

Mulvaney said during a Bloomberg Live interview that the Trump administration would offer $1 in insurance company reimbursements known as cost-sharing reduction (CSR) for ever $1 in funding for the wall.

The ObamaCare payments offset costs for insurers who cover its low-income enrollees.

Trump promised during the campaign that he would build a border wall with Mexico. His administration has started work to build such a wall, though funding hasn't been secured.

Trump submitted a supplemental budget to Congress earlier this year that requested roughly $1.5 billion to help build the border wall.

On Friday, Homeland Security Secretary John Kelly said construction of the U.S.-Mexico border will “move forward” this summer.