Two months into his new role, Homeland Security Secretary Markwayne Mullin finds himself trying to solve a puzzle: How does he deliver on the deportation mandate expected of him by President Donald Trump, while avoiding some of the same pitfalls that led to the ouster of his predecessor?

Mexico's President Claudia Sheinbaum said that she and the U.S. Homeland Security Secretary Markwayne Mullin agreed Thursday to maintain bilateral cooperation rooted in mutual…

Two months into his new role, Homeland Security Secretary Markwayne Mullin finds himself trying to solve a puzzle: How does he deliver on the deportation mandate expected of him…