The House Judiciary Committee convened Monday to hear from four witnesses on lessons from the nearly two-year long Robert S. Mueller III-led investigation into Russian interference in the 2016 election.

The Committee’s leadoff witness was John Dean, former White House Counsel under President Richard Nixon during Watergate. His testimony was meant to provide historical context from Watergate to Mueller’s findings today.

The hearing comes as the Justice Department agreed to release key evidence from the Mueller report to the House Judiciary Committee.