The story is different for Democrats, where backing for Hillary Clinton is strong among more liberal traders and financiers.
"This is a phenomenal country but we have a number of issues to solve, and she's the one to do it," hedge fund manager Marc Lasry told CNBC.com about his support for Hillary Clinton.
Lasry, a longtime Democratic supporter with close ties to the Clinton family, has already emailed potential Clinton supporters and asked them to contribute as much as they can to the cause.
"The response has been extremely positive; there's a huge amount of interest," the billionaire co-founder of Avenue Capital Group said of the response to his financial community outreach.
Individuals can donate up to $2,700 to a candidate directly, but can now give unlimited amounts to "Super PACs," political action committees that aren't allowed to coordinate directly with politicians. Direct donations become public records, but Super PACs are less transparent.
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Tom Steyer, a former hedge fund manager and the largest liberal donor in the 2014 midterms, also appears to be behind Clinton, as indicated by a tweet from his group NextGen Climate:
The advocacy organization supports or attacks politicians based on their efforts around global warming, or lack thereof. A spokesman did not respond to requests for comment.
Soros, the billionaire investor and longtime Democratic booster, has given to Super PAC Ready for Hillary and in 2013 became co-chair of the group's national finance council. A spokesman for Soros declined to comment.
Others in finance who support Clinton either financially, politically or both—or are seen as likely to—are: Blair Effron, co-founder of investment bank and private equity fund Centerview Partners; Orin Kramer, CEO of hedge fund firm Boston Provident; Tony James, president of private equity giant Blackstone Group; Greg Fleming, president of Morgan Stanley Wealth Management; Roger Altman of investment bank Evercore Partners; Mark Gallogly, co-founder of Centerbridge Partners; Tom Nides, vice chairman of Morgan Stanley; and Glenn Hutchins of technology investor Silver Lake Partners.
Others who have previously given to Clinton include Jim Simons, the retired founder of Renaissance Technologies; David Shaw, founder of hedge fund firm D.E. Shaw; and Lloyd Blankfein, CEO of Goldman Sachs.
All declined to comment or did not respond to requests.