Comparing - 2 (revised)

  John Adams and Thomas Jefferson have some similar features.  First of all, they were both the president of the United States.  Also, they both played an important role of the American Revolution and used to delegated to the Continental Congress.  Thomas Jefferson was the signer and author of the Declaration of Independence.  Likewise, John Adams signed it, too.  In addition, they both studied and practiced law.  To sum up, both of them are of central importance to the American history.