It is a federal crime to commit perjury and obstruct justice in civil cases, including sexually harassment cases.

CNN: Transcript: Judiciary Committee impeachment hearing

You tell consumers to commit perjury in state court, yet you warn them about criminal penalties for perjury in bankruptcy court.

FORBES: Many Consumer Bankruptcies Do More Harm Than Good

He also denies another charge of attempting to persuade a witness to commit perjury shortly before the 23-day legal action got under way.

BBC: Tommy Sheridan begins own defence in perjury trial

Her recordings are Exhibit A in an investigation of whether the president asked a witness to commit perjury and conspired to obstruct justice himself.

CNN: Investigating the President

It had also been alleged Mr Sheridan attempted to convince SSP leader Colin Fox to commit perjury but this has been removed from the indictment, the court was told, due to a lack of corroboration.

BBC: Gail Sheridan accused of using IRA interview technique

If a Senator thought the President lied but did not commit perjury, for example, he or she could vote to affirm the lie in the finding of fact without voting to convict on impeachment.

CNN: Fasten your seat belts