Leach has come under intense scrutiny ever since the Inquirer published an article in December of 2017 alleging inappropriate behavior on his part with staff members and campaign volunteers.

About a month after the Inquirer article, Leach sued a woman who accused him of raping her thirty years ago. The allegations against Leach prompted the State Democratic Caucus to hire the law firm of Eckert Seamans to conduct an independent investigation. 

Eckert Seamans released their final report on Leach on September 18, 2019. As part of their conclusion they wrote, “there is no evidence of actionable discrimination or harassment in violation of applicable law or Caucus policies to the extent Caucus policies are interpreted as consistent with federal law. The Caucus may, however, interpret its policies to impose a broader standard than federal law but this is a policy decision that the Caucus must decide for itself.”

Notwithstanding  Eckert Seaman’s findings, at least six candidates have announced that they plan to challenge Leach in the Primary on April 28, 2020.

Prior to this year, Leach has never had a  primary challenger for any of his races for the House or the Senate.