When the U.S. Court of Appeals for the D.C. Circuit hears arguments Friday in a pair of lawsuits from the House Judiciary Committee, the courtroom will feature a number of faces familiar to those keeping a close eye on the litigation between House Democrats and President Donald Trump.

House general counsel Douglas Letter has typically taken the lead in arguing the House’s cases and will do so again Friday for oral arguments over Mueller grand jury materials. In the next case, fellow former Justice Department lawyer Megan Barbero will step up to the plate for the arguments over whether former White House counsel Don McGahn can be compelled to testify.