A billionaire GOP investor said he is considering backing a Republican opponent to President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE if a credible candidate emerges during the 2020 GOP primary.

Stanley Druckenmiller told The New York Times that he would consider donating to an alternative to the president in a GOP primary if he thought a challenger would have a chance against Trump.

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“If I thought such a candidate would be a good president and had a realistic chance of securing the nomination, yes, of course [I would donate]," he told the Times.

Druckenmiller most recently supported former Ohio Gov. John Kasich (R) and former Florida Gov. Jeb Bush (R) during the 2016 primary, donating thousands of dollars to super PACs supporting both men, according to Federal Election Commission (FEC) filings compiled by CampaignMoney.com

The billionaire did not monetarily support the Trump campaign in 2016, according to FEC filings, instead supporting a number of Republican Senate campaigns including Sens. Marco Rubio Marco Antonio RubioFlorida senators pushing to keep Daylight Savings Time during pandemic Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Intelligence chief says Congress will get some in-person election security briefings MORE (R-Fla.) and Rob Portman Robert (Rob) Jones PortmanRomney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery House passes B bill to boost Postal Service MORE (R-Ohio).

Druckenmiller's statements come as the Republican Party issued a rare declaration of support for Trump's campaign this week ahead of the 2020 primary, a move that is largely symbolic but could serve to quell any high-profile challenges from the GOP against the president.

The resolution adopted this week at the Republican National Committee's winter meeting declared the party's “undivided support for President Donald J. Trump and his effective Presidency" ahead of the 2020 election.