Facebook cofounder Dustin Moskovitz has pledged $20 million to fight Donald Trump ahead of the November election.

In a blog post titled, "Compelled to Act," published on Thursday, Moskovitz announced that he and his wife, Cari Tuna, would donate to several Democratic organizations -; including the Hillary Victory Fund and the Democratic Congressional Campaign Committee -; citing the unprecedented nature of this year's presidential election.

"If Donald Trump wins, the country will fall backward, and become more isolated from the global community," Moskovitz wrote.

He added: "The Democratic Party, and Hillary Clinton in particular, is running on a vision of optimism, pragmatism, inclusiveness, and mutual benefit."

For the most part, political donations from Silicon Valley moguls have run the gamut during this election cycle, with Oracle's Larry Ellison and PayPal cofounder Peter Thiel boosting GOP candidates. Napster founder Sean Parker and Salesforce CEO Marc Benioff have thrown their money behind Hillary Clinton.

Until now, Ellison had been the tech industry's biggest political donor. He gave $5 million to support Sen. Marco Rubio of Florida. Rubio dropped out of the GOP primary in March.

Moskovitz, who said he has not donated to nor endorsed a candidate in a presidential election before, summed up his reasons for doing it now:

"We hope these efforts make it a little more likely that Secretary Clinton is able to pursue the agenda she's outlined, and serve as a signal to the Republican Party that by running this kind of campaign?--one built on fear and hostility?--and supporting this kind of candidate, they compel people to act in response. We are not the only ones being activated so strongly during this election."

--This post orignally appeared on Business Insider.