Before revision: Ronald Reagan, a former actor, union leader, and corporate spokesman, was first elected to public office at 55 when he became Governor of California and was the oldest man to have served as U.S. President until Trump was .
After revision: Ronald Reagan, a former actor, union leader, and corporate spokesman, was first elected to public office at 55 when he became Governor of California and was the oldest man to have served as U.S. President until Biden's presidency .