Simplify the following text for a Grade 13 native English-speaking person.
Original: Although the office of President is less influential than that of the Chancellor and is mostly concerned with ceremonial matters , KÃ hler was a highly popular politician during his tenure .
Simplified: Although the office of President is less influential than that of the Chancellor and is mostly concerned with ceremonial matters , KÃ hler was a highly popular politician during his term .