A lawyer who worked on Hillary Clinton’s 2016 presidential campaign faces a criminal trial this week on charges of lying to the FBI in a crucial test for a special prosecutor appointed during President Donald Trump’s administration.

A federal judge in the District of Columbia will seat a jury Monday in the politically charged case of attorney Michael Sussmann, who is accused of misleading the FBI about who he represented when he approached the bureau with since-discredited information tying Trump to a Russian bank.

Opening arguments are expected Tuesday, with Sussmann’s lawyers planning to argue their client is innocent and that the allegations against him are far removed from the sort of grave FBI misconduct Republicans hoped U.S. Special Counsel John Durham would reveal.