That's according to a candid 62-page document reviewing OSF's work on immigration reform discussed in May at the group's board meeting in Montgomery, Ala.

The document, which is one of 2,500 stolen from OSF in a massive hack and released over the weekend, shows that the Soros group believes that its $7.7 million investment in groups pushing for immigration reform was responsible for the passage of the Senate's 2013 comprehensive immigration reform bill.

The bill, which was introduced by a bi-partistan group of senators known as the "Gang of Eight," passed the upper chamber 68-32.

Though the measure was quashed by House Republicans, Soros' group believes that pro-immigration groups were made stronger because of the investment in activists, alliances, infrastructure and media outreach, the document shows.