MANILA, Philippines — Sandro Marcos’ rise in the House of Representatives has been relatively quick. In 2022, he entered Congress as a first-term representative of Ilocos Norte’s first district. By the opening of the 20th Congress three years later, he had become House majority leader, one of the chamber’s key positions. But his experience in Congress began before he became a lawmaker. Marcos previously worked as a staff member in the office of …