According to a review of contributions by The Hill, Boston-based Suffolk Construction made two contributions of $100,000 to Priorities USA, which is backing the presumptive Democratic presidential nominee.

At the time it made the contributions, Suffolk held multiple contracts worth $976,560 with the Department of Defense for maintenance and construction projects at a Naval base in Newport, R.I., and the U.S. Military Academy in West Point, N.Y., according to the government website USASpending.gov.

Suffolk — which, by Forbes’s estimate, brings in some $2 billion in revenue annually — also donated $10,000 in 2015 to Right to Rise, a super-PAC that supported Republican Jeb Bush’s now-defunct presidential bid.

The donations from Suffolk highlight how a 70-year-old campaign finance law meant to prevent pay-to-play deals between public officials and companies making money from the government is often ignored by those making the donations and those on the receiving end.