Conversation so far:
What was the Covode Committee?
The Covode Committee was created to investigate James Buchanan's administration for alleged impeachable offenses, such as bribery and extortion of representatives.
Was there ever any evidence found against James Buchanan's administration by the Covode Committee?
The committee was unable to establish grounds for impeaching James Buchanan; however, the majority report issued on June 17 alleged corruption and abuse of power among members of his cabinet.

Question: What year did they try to impeach him?
Self-contained rewrite: What year did they try to impeach James Buchanan?