Uber's chief technology officer Thuan Pham blasted President Donald Trump in an email to a small group of staff shortly after the presidential election, according to a report from Business Insider.

The email reportedly resurfaced this week, as more employees circulated the message internally. In the email, Pham called Trump a "deplorable person" and said his election was a huge step backward — likening it to the rise of ruthless dictators and regimes such as Mao Zedong in China and the Khmer Rouge in Cambodia, Business Insider reported. Uber declined to comment.

Uber CEO Travis Kalanick is one of a number of tech executives named to Trump's Strategic and Policy forum. Some employees see this as a shrewd move to ensure the company has the president's ear on issues it cares about — like regulations governing autonomous cars — but others worry about the costs of being perceived as pro-Trump, according to the report.