The owner of X, a social media website formerly known as Twitter, wrote that 38-year-old Ramaswamy "states his beliefs clearly."
Ramaswamy, who is of Indian descent, kicked off his presidential campaign in February as a candidate in the 2024 Republican primary.
Unlike most Republican candidates, who favor further US military assistance to Ukraine, Ramaswamy has proposed a peace treaty that would freeze the current battle lines in Ukraine, establish a Korean-style armistice and prohibit Ukraine from entering NATO.