Donald Trump’s second attempt at the White House is terrifying because of who the former president might install into power, former Homeland Security Adviser to Mike Pence, Olivia Troye, said Saturday. Troye appeared on MSNBC, where she was asked what is “concerning” her most about the potential for a second Trump presidency. “Honestly,” Troye, said, “just think about who he will place in his cabinet.” POLL: Should Trump be allowed to run for office? ALSO READ: ‘Official’ Trump calendar omits a critical detail “And the one thing that Trump has learned from his first term is that he will place …