Sen. Amy Klobuchar Amy KlobucharSocial media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (D-Minn.) is rebuffing campaign contributions from corporate political action committees a day after declaring her bid for the White House.

Carlie Waibel, a spokesperson for Klobuchar’s campaign, said that the nascent presidential candidate will not accept money from corporate PACs, following the lead of other Democratic hopefuls.

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"The senator is not accepting contributions from corporate PACs during her campaign for president," Waibel said in a statement first reported by CNBC on Monday.

Klobuchar announced her candidacy for her party’s 2020 presidential nomination on Sunday at an event in her home state of Minnesota, making her the latest Democrat to throw their name into the rapidly growing primary field.

That announcement came a day after one of Klobuchar’s fellow senators, Elizabeth Warren Elizabeth WarrenHarris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda Judd Gregg: The Kamala threat — the Californiaization of America GOP set to release controversial Biden report MORE (D-Mass.), made her candidacy official during a kick-off event in Massachusetts.

Warren has also pledged not to take corporate PAC contributions to her campaign.

Among the other candidates to publicly reject corporate PAC money are former Housing and Urban Development Secretary Julián Castro and Sen. Kirsten Gillibrand Kirsten GillibrandSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Suburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits MORE (D-N.Y.). Another 2020 contender, Sen. Kamala Harris Kamala HarrisButtigieg stands in as Pence for Harris's debate practice First presidential debate to cover coronavirus, Supreme Court Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (D-Calif.), said last year that she would no longer accept donations from such PACs.

The decision by several candidates to divest from corporate PAC contributions reflects growing opposition to big-dollar donations among the Democratic Party’s voter base.

At the same time, candidates are relying increasingly on small-dollar contributions facilitated by ActBlue, the Democratic Party’s online fundraising platform.