The communications director for Sen. Kamala Harris Kamala HarrisThe Hill's Campaign Report: Trump and Biden vie for Minnesota | Early voting begins in four states | Blue state GOP governors back Susan Collins Kamala Harris: Black Americans have been 'disproportionately harmed' by Trump Biden town hall draws 3.3 million viewers for CNN MORE (D-Calif.) on Monday mocked former Fox News host Bill O'Reilly after he stated Harris had "lost" his vote for president.

"Somehow, we will soldier on," Lily Adams said on Twitter with an accompanying screenshot of O'Reilly's comments on Harris.

Somehow, we will soldier on pic.twitter.com/1P1hyMizBf — Lily Adams (@adamslily) January 21, 2019

Harris, 54, announced on ABC's "Good Morning America" on Monday that she would run for president in 2020.

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"When I look at this moment in time, I know the American people deserve to have someone who is going to fight for them ... and put them in front of self-interest," she said in an announcement on Martin Luther King Jr. Day.

She is the latest high-profile Democrat to announce plans for a White House bid. Sens. Kirsten Gillibrand Kirsten GillibrandSuburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits The Hill's Campaign Report: 19 years since 9/11 | Dem rival to Marjorie Taylor Greene drops out | Collin Peterson faces fight of his career | Court delivers blow to ex-felon voting rights in Florida MORE (D-N.Y.) and Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass.) have also declared their intentions to run for president.

O'Reilly, a conservative, said in a video shared on Twitter that Harris's policy views were similar to Warren's and Gillibrand's. But he claimed that Harris would "lose" his vote because of her actions during the hearings for Supreme Court Justice Brett Kavanaugh Brett Michael KavanaughProgressive group to spend M in ad campaign on Supreme Court vacancy Senate Republicans face tough decision on replacing Ginsburg Trump reacts to Ginsburg's death: 'An amazing woman who led an amazing life' MORE.

Full steam ahead on 2020 – Kamala Harris announced she will run today. She denied Brett Kavanaugh due process in front of the nation, and in so doing has lost my vote. I could not imagine any American for somebody who does not believe in due process. pic.twitter.com/9NzPikOzM7 — Bill O'Reilly (@BillOReilly) January 21, 2019

"Kamala Harris announced she will run today," O'Reilly said. "She denied Brett Kavanaugh due process in front of the nation, and in so doing has lost my vote. I could not imagine any American for somebody who does not believe in due process."

Kavanaugh faced multiple sexual misconduct accusations as he was being considered for a seat on the Supreme Court.

Harris, a member of the Senate Judiciary Committee, said in October that Kavanaugh's confirmation was a "denial of justice" and a "disgrace."

O'Reilly left Fox News after The New York Times reported that he had paid $13 million to five women to settle allegations of sexual misconduct. The newspaper also reported in October 2017 that O'Reilly paid $32 million to settle a sexual harassment claim against him.