President Trump’s first two years in office saw a fourfold increase in criminal leak referrals to the Justice Department, and experts say a spike in prosecutions is poised to follow.

Few of the 120 suspected criminal leaks referred by federal agencies in 2017 resulted in charges, but experts say it often takes nine to 18 months, meaning arrests are likely imminent after referrals rocketed up from just 37 in 2016 and 18 in 2015, remaining high in 2018 with 88.