Simplify the following text for a Grade 7 native English-speaking person.
Original: Since 2001 , the honorary title of `` President pro tempore emeritus '' has been given to a member of the minority party in the United States Senate who had previously served as President pro tempore .
Simplified: When the Vice President can not be in charge , the President pro tempore is in charge of the Senate . Many people still think of the President pro tempore as de facto president of the Senate .