Homeland security expert Juliette Kayyem spoke with Boston Public Radio on Friday about Olivia Troye, former homeland security, counterterrorism and coronavirus adviser to Vice President Mike Pence, who quit her job in July and has now endorsed Joe Biden.

“She’s a significant staffer, so it is big in the sense that she left the task force, she left government, and then she goes public in support for Biden,” Kayyem said. “It assures the president to be the pig that he is in terms of how he talks about people.”

Kayyem is an analyst for CNN, former assistant secretary at the Department of Homeland Security and faculty chair of the homeland security program at Harvard University’s Kennedy School of Government.