Simplify the following text for a Grade 6 native English-speaking person.
Original: Roosevelt certified William Howard Taft to be a genuine `` progressive '' in 1908 , when Roosevelt pushed through the nomination of his Secretary of War for the Presidency .
Simplified: Roosevelt did not run for President in 1908 , and wanted William Howard Taft to be President instead . Taft was chosen , and Roosevelt went to Africa to hunt big game .