Re: Strange assumption
President Clinton did not lie to Congress under oath. He lied under oath to a grand jury investigating sexual harassment in the Clinton administration of Arkansas. Congress impeached him for perjury before a grand jury and obstruction of justice. If he HAD admitted his "sexual relations with that woman, Ms Lewinksy", then his Republican opponents wouldn't have had criminal grounds to impeach. Mr Clinton lied under oath about a blowjob. He was impeached for lying under oath, not the blowjob.
On a different topic, but related to secrets and perjury by high government officials, where is the indictment of James Clapper for perjury for his "least untruthful" answers to Congress while under oath?