Simplify the following text for a Grade 8 native English-speaking person.
Original: Theodore `` Teddy '' Roosevelt ( ; October 27 , 1858 â `` January 6 , 1919 ) was the 26th President of the United States ( 1901 â `` 1909 ) .
Simplified: Theodore `` Teddy '' Roosevelt ( 1858 â `` 1919 ) , was the 26th president of the United States .