When Thiel spoke at the 2016 Republican National Convention, he had more hope that the party would concentrate on economic issues, his business associate said.
Four political sources also told Reuters that Thiel is taking a step back from U.S. politics.
In 2012, Thiel backed libertarian lawmaker Ron Paul, and in 2016 he donated some $1.25 million to the campaign efforts of Trump, who is the frontrunner for the 2024 Republican nomination.
In the 2022 election cycle, however, Thiel emerged as a potential Republican kingmaker, contributing more than $35 million to 16 federal-level Republican candidates, according to OpenSecrets.
The business associate said he was not aware of any special proviso for former employees.