David Marcus, the longtime president of PayPal and a prominent mega-donor for left-wing candidates, has endorsed former President Donald Trump in a surprising turn of events.

Marcus announced on the social media platform X that he would not support Vice President Kamala Harris in her presidential bid, instead backing the GOP nominee, in a move has shocked both Democrats and Republicans across the country.

Marcus said in his lengthy post that he was “crossing the Rubicon and backing the Republican Party and President Trump.” He continued: “Many — including a former version of myself — get trapped in a mental framework that becomes their identity and prevents them from radically evolving their thinking with new facts and information. I finally broke free from it. My journey has been a gradual political 180 from where I stood in every previous election. It has been an eye-opening process of disenchantment, zero-basing lifelong beliefs, and rebuilding from there.”

He continued: “In 2017, a good friend enlisted me to pitch the DNC to raise $100M from Silicon Valley founders and executives. The aim was to use these funds and know-how to build a CRM and tech platform to prevent a repeat of Hillary Clinton’s inadequate, outdated 2016 campaign. We met with DNC leadership, who told us we could raise that money, but it would have to go to the general fund; a single-digit percentage would then be allocated to tech. In the wake of one of their most shocking failures, they didn’t want the help.”

Marcus mentioned that he became politically aware in 2019 while working at Meta, just after the release of the Libra white paper. He testified before both chambers of Congress and spent a significant amount of time in Washington, D.C. interacting with lawmakers, members of then-President Trump’s Cabinet, regulators, and two different administrations.  He said, “At the time, I still believed the mainstream idea that Democrats were all about serving the People.”

“However, I was shocked to learn that, for the most part, Republicans cared more deeply about their constituents, while Democrats, in my experience, cared more about government power and control. This is my observation on balance, with many stories to back it up. I also found that more Republicans wanted to understand our project’s goals and took the time to learn about the risks of censoring payments and controlling the network. I found myself remarkably aligned with them,” he continued.

Marcus stated that the coronavirus pandemic significantly altered his perspective. Although he emphasized that he is not a conspiracy theorist and does not align with many vaccine-related narratives, he was deeply disturbed by the “censorship machine” designed to obscure the virus’s true origin and the shaming of those who opposed vaccines and lockdowns.

I am crossing the Rubicon and backing the Republican Party and President Trump.

Many — including a former version of myself — get trapped in a mental framework that becomes their identity and prevents them from radically evolving their thinking with new facts and information. I…

— David Marcus (@davidmarcus) July 31, 2024

He then ripped on Democrats for promoting fake narratives for the sake of pushing their own agenda: “This trend of spinning and manufacturing a parallel reality to serve the Dem agenda, solidified by complicit mainstream media, hit home with the Hunter Biden laptop story, the coordinated vilification of President Trump and his followers, and President Biden’s cognitive decline — depriving voters of a voice in a proper primary. These examples displayed the hubris of the current Dem leadership. You must think the American people are fools to believe the spin on these issues. I despise this elite vs. general population ideology viscerally.”

Later, he said the country needs a “President who is unequivocally pro: America, the Constitution, business, Bitcoin/crypto, innovation, Israel, small government, legal immigration, free speech, meritocracy, and common sense — and anti: regulatory proliferation, illegal immigration, unjust wars, Iran’s current regime, and domestic groups that oppose American values. These issues are central to President Trump’s platform.”