Presidential candidate and author Marianne Williamson Marianne WilliamsonMarianne Williamson discusses speaking at People's Party Convention Fewer people watched opening night of Democratic convention compared to 2016 Marianne Williamson: Democratic convention 'like binge watching a Marriott commercial' MORE endorsed an impeachment inquiry into President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE on Tuesday afternoon, saying recent allegations against him meant she could no longer be “cautious on the topic.”

Williamson wrote in a statement Tuesday that she had previously been unsure on the matter due to an impeachment inquiry’s lack of ability to pass the GOP-controlled Senate as well as the possibility that Trump could use it to “make himself look like a victim.”

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However, Williamson wrote that her mind had been changed by allegations that Trump threatened to withhold military aid from Ukraine unless the nation launched an investigation into former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE’s son.

“[W]hat the president has done now is more than cruel and more than a danger to our values. It could be a danger to our country,” Williamson wrote.

“When a president has no qualms withholding aid from another country unless its government agrees to help him get dirt on his political opponents, America has a serious problem. Our president has apparently no respect for the demands, the responsibilities, or the limits to his power,” she added.

The Ukraine allegations have prompted a flood of calls for impeachment from other Democrats, including several House members in competitive swing seats and Williamson’s fellow presidential candidate Andrew Yang Andrew YangBiden's latest small business outreach is just ... awful Doctor who allegedly assaulted Evelyn Yang arrested on federal charges The Hill's Campaign Report: Biden weighs in on police shootings | Who's moderating the debates | Trump trails in post-convention polls MORE, with the entrepreneur announcing his support for impeachment around the same time.

“I have decided that impeachment is the only responsible way that we, as citizens, can take a stand against the president’s egregious overreach and careless use of the powers of the presidency,” Williamson wrote.

“The Founders established the power of impeachment to protect our democracy at such a time as this. They did their part. It is time for us to do ours,” she added.