Hundreds of attorneys, including former heads of bar associations and retired federal judges, are calling for bar associations to investigate and condemn the lawyers behind President Donald Trump’s election lawsuits.

More than 1,500 lawyers signed onto the letter organized by the group Lawyers Defending American Democracy as of Sunday evening, which targets Trump personal attorney Rudy Giuliani, Trump campaign legal adviser Jenna Ellis, attorneys Joseph DiGenova and Victoria Toensing as well as Sidney Powell, a former member of the campaign’s legal team.