A Republican organization has launched a digital billboard ad campaign asking what President Donald Trump is hiding, The Hill is reporting. The group, Republicans for the Rule of Law, released the campaign on Wednesday. The billboards show a large image of Trump. Alongside him are images of Secretary of State Mike Pompeo, former national security adviser John Bolton, acting White House chief of staff Mick Mulvaney, and Trump’s personal attorney Rudy Giuliani. All four are shown with tape covering their mouths. “What is Trump hiding?” is written across the top of the digital billboards. Across the bottom are the words: “America needs the whole truth.”