Former FBI director James Comey has pleaded not guilty to two charges of making false statements to lawmakers and obstructing a congressional proceeding.
His lawyer entered the plea on his behalf in a federal court in Alexandria, Virginia, on Wednesday morning.
Patrick Fitzgerald said he would seek to have the case dismissed for several reasons including that his client, a critic of US President Donald Trump, was being targeted.
Mr Comey was indicted a few days after Trump urged his attorney general to take action against him. After Mr Comey's lawyer requested a speedy trial, the judge set a date of 5 January.
Both the prosecution and defence expected the trial to last just two or three days.
In court, Mr Comey's lawyer Patrick Fitzgerald indicated plans to file motions to dismiss based on alleged vindictiveness and improper appointment of the U.S. attorney handling the case.
Comey was dismissed as FBI director in 2017 after leading investigations into Russian interference in the presidential election and concerning Hillary Clinton's email server.
The government claims Comey misled Congress during a Senate hearing, stating falsely that he had not authorized leaks regarding investigations.
Prosecutors accuse him of corruptly seeking to obstruct congressional inquiry.
Comey's legal challenges come amid intense political scrutiny, which escalated following Trump's public demands for prosecution.
Appearing upbeat in court, he was joined by family as he advocated for his innocence, stating, 'I’m innocent. So let’s have a trial.'
