Clinton was impeached by the House of Representatives for Perjury,l which means lying under oath. The Republicans in the house did not initate these charges. They were first leveled at Clinton by a judge in Arkansas.She alleged that Clinton lied under oath when he testified in a lawsuit filed against him for
Sexual Harrassment by Paula Jones. Jones alleged that Clinton tried to seduce her in a hotel room.
Interestingly, Clinton never contested the Arkansas charges. After he left the White House, he made a deal with the Arkansas Bar Association to surrender his law license for 5 years in exchange for their failure to prosecute him.