NEWBERRY — Nikki Haley once again made jabs at the current and former presidents’ ages while campaigning in her home state Saturday, this time with examples of recent blunders as to why neither should be in the White House. Repeating her call for competency tests for politicians over age 75, Haley said a federal report released Thursday on President Joe Biden and a flub last month by former President Donald Trump prove her point. “Why do we have to have someone in their 80s running for office?” Haley asked a crowd of about 100 outside the Newberry Opera House, her first of three campaigns stop…