President Bush appears to have won the support of a high-profile Silicon Valley executive who was a devotee of President Clinton.

The chief executive officer of Oracle Corporation, Larry Ellison, recently gave $100,000 to a political group pressing for Mr. Bush’s re-election, Progress for America Voter Fund, according to a report filed with the Federal Election Commission.

The gift is a modest one compared with sums that other wealthy individuals have given to such organizations, known as 527s for the section of the tax code under which they were created. However, Mr. Ellison’s move is particularly notable because he has often spoken in reverential terms about Mr. Clinton.

“I hope they can amend the U.S. constitution to let Bill Clinton run again,” Mr. Ellison said at an industry meeting in 2000.

In an interview last year with the San Francisco Chronicle, the high tech executive described himself as a Democrat before offering up yet another tribute to Mr. Clinton. “I’m proud of Bill Clinton and a very close friend of Bill Clinton and a great admirer of Bill Clinton,” Mr. Ellison said.

Through a spokeswoman, Mr. Ellison declined to comment. Progress for America did not return phone calls.

However, a trade association official said Mr. Ellison welcomed a delegation of Republican members of Congress a few months ago with glowing praise for Mr. Bush.

“He was very pro-Bush,” said the vice president of Republican outreach for TechNet, Margaret Lauderback. “We were surprised.”

Ms. Lauderback said she did not know what prompted the businessman to shift or at least broaden his political allegiances. “I don’t know what his change of heart is,” she said.

Mr. Ellison reportedly offered Mr. Clinton a slot on the company’s board, but the former president has not become an Oracle director. A White House press secretary under Mr. Clinton, Joseph Lockhart, went to work at Oracle soon after leaving the White House, but he has since parted with the firm.