House Judiciary Committee Chairman Bob Goodlatte on Thursday subpoenaed the memos kept by former FBI Deputy Director Andrew McCabe, the latest step in the Republican effort to investigate what they say are questionable Justice Department and FBI actions during the 2016 presidential election.

“[G]iven the department’s ongoing delays and/or refusal to produce these documents, I am left with no choice but to issue the enclosed subpoena to compel their production,” Goodlatte, R-Va., wrote in his Thursday letter to Attorney General Jeff Sessions explaining the subpoena.