If the US is a nation of laws and not men, then shouldn't candidates and sitting presidents be subject to the same laws? Bill Clinton was impeached while in of

If the US is a nation of laws and not men, then shouldn't candidates and sitting presidents be subject to the same laws? Bill Clinton was impeached while in office for perjury over some embarrassing lies about his personal life. (Albeit as it may have related to a possible pattern of bad behavior.)