According to state.gov, Secretary Pompeo met with former Secretary of State Henry Kissinger in New York City on September 27, 2019,  This was three days after the impeachment inquiry was announced  (September 24, 2019: Speaker Nancy Pelosi Announces Formal Impeachment Inquiry) and the same day House Committees Subpoena Pompeo For Documents, Schedule Depositions of Senior @StateDept Officials. Just coincidence, of course, since he was in New York for UNGA.

Have we seen Pompeo with any other of his predecessors besides HAK?

Honored to meet again with one of my most esteemed predecessors, Dr. Henry Kissinger. I'm always grateful for our conversations. pic.twitter.com/KGDo2b42OV

— Secretary Pompeo (@SecPompeo) September 29, 2019

President Richard Nixon's resignation letter in the wake of the Watergate scandal, 1974. pic.twitter.com/cl1a39DY99

— History Lovers Club (@historylvrsclub) December 22, 2018